In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). Previously, nilfs_evict_inode() could cause use-after-free read for nilfs_root if inodes are left in "garbage_list" and released by nilfs_dispose_list at the end of nilfs_detach_log_writer(), and this bug was fixed by commit 9b5a04ac3ad9 ("nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()"). However, it turned out that there is another possibility of UAF in the call path where mark_inode_dirty_sync() is called from iput(): nilfs_detach_log_writer() nilfs_dispose_list() iput() mark_inode_dirty_sync() __mark_inode_dirty() nilfs_dirty_inode() __nilfs_mark_inode_dirty() nilfs_load_inode_block() --> causes UAF of nilfs_root struct This can happen after commit 0ae45f63d4ef ("vfs: add support for a lazytime mount option"), which changed iput() to call mark_inode_dirty_sync() on its final reference if i_state has I_DIRTY_TIME flag and i_nlink is non-zero. This issue appears after commit 28a65b49eb53 ("nilfs2: do not write dirty data after degenerating to read-only") when using the syzbot reproducer, but the issue has potentially existed before. Fix this issue by adding a "purging flag" to the nilfs structure, setting that flag while disposing the "garbage_list" and checking it in __nilfs_mark_inode_dirty(). Unlike commit 9b5a04ac3ad9 ("nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()"), this patch does not rely on ns_writer to determine whether to skip operations, so as not to break recovery on mount. The nilfs_salvage_orphan_logs routine dirties the buffer of salvaged data before attaching the log writer, so changing __nilfs_mark_inode_dirty() to skip the operation when ns_writer is NULL will cause recovery write to fail. The purpose of using the cleanup-only flag is to allow for narrowing of such conditions.

suse_linux SUSE-SU-2025:03600-1: SUSE openSUSE 15 : Security update for the Linux Kernel (Important) (SUSE-SU-2025:03600-1)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput During unmount process of nilfs2,     nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer().
    Previously, nilfs_evict_inode() could cause use-after-free read for nilfs_root if inodes are left in     garbage_list and released by nilfs_dispose_list at the end of nilfs_detach_log_writer(), and this bug     was fixed by commit 9b5a04ac3ad9 (nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()).
    However, it turned out that there is another possibility of UAF in the call path where     mark_inode_dirty_sync() is called from iput(): nilfs_detach_log_writer() nilfs_dispose_list() iput()     mark_inode_dirty_sync() __mark_inode_dirty() nilfs_dirty_inode() __nilfs_mark_inode_dirty()     nilfs_load_inode_block() --> causes UAF of nilfs_root struct This can happen after commit 0ae45f63d4ef     (vfs: add support for a lazytime mount option), which changed iput() to call mark_inode_dirty_sync() on     its final reference if i_state has I_DIRTY_TIME flag and i_nlink is non-zero. This issue appears after     commit 28a65b49eb53 (nilfs2: do not write dirty data after degenerating to read-only) when using the     syzbot reproducer, but the issue has potentially existed before. Fix this issue by adding a purging flag     to the nilfs structure, setting that flag while disposing the garbage_list and checking it in
    __nilfs_mark_inode_dirty(). Unlike commit 9b5a04ac3ad9 (nilfs2: fix use-after-free bug of nilfs_root in     nilfs_evict_inode()), this patch does not rely on ns_writer to determine whether to skip operations, so     as not to break recovery on mount. The nilfs_salvage_orphan_logs routine dirties the buffer of salvaged     data before attaching the log writer, so changing __nilfs_mark_inode_dirty() to skip the operation when     ns_writer is NULL will cause recovery write to fail. The purpose of using the cleanup-only flag is to     allow for narrowing of such conditions. (CVE-2023-53311)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of kernel installed on the remote host is prior to 4.14.326-245.539. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2264 advisory.

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

    A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the     fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds     read by setting the size fields with a value beyond the array boundaries, leading to a crash or     information disclosure. (CVE-2023-39192)

    A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the     flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds     read, leading to a crash or information disclosure. (CVE-2023-39193)

    A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing     of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local     privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an     information disclosure. (CVE-2023-39194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage     collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.

    We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8. (CVE-2023-4244)

    The upstream commit describes this issue as follows:

    The missing IP_SET_HASH_WITH_NET0 macro in ip_set_hash_netportnet can lead to the use of wrong     `CIDR_POS(c)` for calculating array offsets, which can lead to integer underflow. As a result, it leads to     slab out-of-bound access. (CVE-2023-42753)

    A flaw was found in rsvp_change(). The root cause is an slab-out-of-bound access, but since the offset to     the original pointer is an `unsign int` fully controlled by users, the behavior is usually a wild pointer     access. (CVE-2023-42755)

    An issue was discovered in drivers/net/ethernet/intel/igb/igb_main.c in the IGB driver in the Linux kernel     before 6.5.3. A buffer size may not be adequate for frames larger than the MTU. (CVE-2023-45871)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

    A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control)     component can be exploited to achieve local privilege escalation.

    If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing     curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in     update_vf(). This leaves a dangling pointer that can cause a use-after-free.

    We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f. (CVE-2023-4623)

    A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to     achieve local privilege escalation.

    When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free     in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in     agg_dequeue().

    We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8. (CVE-2023-4921)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: add NULL check in xfrm_update_ae_params (CVE-2023-53147)

    In the Linux kernel, the following vulnerability has been resolved:

    udf: Fix uninitialized array access for some pathnames (CVE-2023-53165)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix possible memory leak if device_add() fails (CVE-2023-53174)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c     (CVE-2023-53179)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Fix data-races around user->unix_inflight. (CVE-2023-53204)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: storvsc: Fix handling of virtual Fibre Channel timeouts (CVE-2023-53245)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/radeon: Fix integer overflow in radeon_cs_parser_init (CVE-2023-53309)

    In the Linux kernel, the following vulnerability has been resolved:

    nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput (CVE-2023-53311)

    In the Linux kernel, the following vulnerability has been resolved:

    pstore/ram: Check start of empty przs during init (CVE-2023-53331)

    In the Linux kernel, the following vulnerability has been resolved:

    ACPICA: Add AML_NO_OPERAND_RESOLVE flag to Timer (CVE-2023-53395)

    In the Linux kernel, the following vulnerability has been resolved:

    HID: multitouch: Correct devm device reference for hidinput input_dev name (CVE-2023-53454)

    In the Linux kernel, the following vulnerability has been resolved:

    FS: JFS: Fix null-ptr-deref Read in txBegin (CVE-2023-53457)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Fix null-ptr-deref in unix_stream_sendpage(). (CVE-2023-53469)

    In the Linux kernel, the following vulnerability has been resolved:

    kobject: Add sanity check for kset->kobj.ktype in kset_register() (CVE-2023-53480)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev (CVE-2023-53485)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-330 advisory.

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    The fix for XSA-423 added logic to Linux'es netback driver to deal witha frontend splitting a packet in a     way such that not all of the headerswould come in one piece.  Unfortunately the logic introduced     theredidn't account for the extreme case of the entire packet being splitinto as many pieces as permitted     by the protocol, yet still beingsmaller than the area that's specially dealt with to keep all     (possible)headers together.  Such an unusual packet would therefore trigger abuffer overrun in the driver.
    (CVE-2023-34319)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the     chain's owner rule can also release the objects in certain circumstances.

    We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8. (CVE-2023-3777)

    A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing     of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local     privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an     information disclosure. (CVE-2023-39194)

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    On an error when building a nftables rule, deactivating immediate expressions in     nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

    We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID (CVE-2023-4147)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

    A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux     Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which     can result in a memory leak. (CVE-2023-4569)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: add NULL check in xfrm_update_ae_params (CVE-2023-53147)

    In the Linux kernel, the following vulnerability has been resolved:

    igb: Fix igb_down hung on surprise removal (CVE-2023-53148)

    In the Linux kernel, the following vulnerability has been resolved:

    udf: Fix uninitialized array access for some pathnames (CVE-2023-53165)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix possible memory leak if device_add() fails (CVE-2023-53174)

    In the Linux kernel, the following vulnerability has been resolved:

    dma-buf/dma-resv: Stop leaking on krealloc() failure (CVE-2023-53181)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: exit gracefully if reloc roots don't match (CVE-2023-53183)

    In the Linux kernel, the following vulnerability has been resolved:

    vxlan: Fix nexthop hash size (CVE-2023-53192)

    In the Linux kernel, the following vulnerability has been resolved:

    sched/fair: Don't balance task to its current running CPU (CVE-2023-53215)

    In the Linux kernel, the following vulnerability has been resolved:

    smb: client: fix warning in cifs_smb3_do_mount() (CVE-2023-53230)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: storvsc: Fix handling of virtual Fibre Channel timeouts (CVE-2023-53245)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: set_page_extent_mapped after read_folio in btrfs_cont_expand (CVE-2023-53247)

    In the Linux kernel, the following vulnerability has been resolved:

    ovl: fix null pointer dereference in ovl_permission() (CVE-2023-53260)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/client: Fix memory leak in drm_client_modeset_probe (CVE-2023-53288)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_rbtree: fix overlap expiration walk (CVE-2023-53304)

    In the Linux kernel, the following vulnerability has been resolved:

    nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput (CVE-2023-53311)

    In the Linux kernel, the following vulnerability has been resolved:

    fs/ntfs3: Enhance sanity check while generating attr_list (CVE-2023-53328)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: fix BUG_ON condition in btrfs_cancel_balance (CVE-2023-53339)

    In the Linux kernel, the following vulnerability has been resolved:

    ip6mr: Fix skb_under_panic in ip6mr_cache_report() (CVE-2023-53365)

    In the Linux kernel, the following vulnerability has been resolved:

    net: dcb: choose correct policy to parse DCB_ATTR_BCN (CVE-2023-53369)

    In the Linux kernel, the following vulnerability has been resolved:

    mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() (CVE-2023-53401)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/ttm: fix bulk_move corruption when adding a entry (CVE-2023-53444)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Fix null-ptr-deref in unix_stream_sendpage(). (CVE-2023-53469)

    In the Linux kernel, the following vulnerability has been resolved:

    powerpc/rtas_flash: allow user copy to flash block cache objects (CVE-2023-53487)

    In the Linux kernel, the following vulnerability has been resolved:

    mptcp: fix disconnect vs accept race (CVE-2023-53490)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: fix slab-use-after-free in decode_session6 (CVE-2023-53500)

    In the Linux kernel, the following vulnerability has been resolved:

    virtio-mmio: don't break lifecycle of vm_dev (CVE-2023-53515)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.15.128-80.144. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2023-026 advisory.

    Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    The fix for XSA-423 added logic to Linux'es netback driver to deal witha frontend splitting a packet in a     way such that not all of the headerswould come in one piece.  Unfortunately the logic introduced     theredidn't account for the extreme case of the entire packet being splitinto as many pieces as permitted     by the protocol, yet still beingsmaller than the area that's specially dealt with to keep all     (possible)headers together.  Such an unusual packet would therefore trigger abuffer overrun in the driver.
    (CVE-2023-34319)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the     chain's owner rule can also release the objects in certain circumstances.

    We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8. (CVE-2023-3777)

    A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing     of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local     privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an     information disclosure. (CVE-2023-39194)

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    On an error when building a nftables rule, deactivating immediate expressions in     nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

    We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID (CVE-2023-4147)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

    A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux     Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which     can result in a memory leak. (CVE-2023-4569)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: add NULL check in xfrm_update_ae_params (CVE-2023-53147)

    In the Linux kernel, the following vulnerability has been resolved:

    udf: Fix uninitialized array access for some pathnames (CVE-2023-53165)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix possible memory leak if device_add() fails (CVE-2023-53174)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: exit gracefully if reloc roots don't match (CVE-2023-53183)

    In the Linux kernel, the following vulnerability has been resolved:

    vxlan: Fix nexthop hash size (CVE-2023-53192)

    In the Linux kernel, the following vulnerability has been resolved:

    smb: client: fix warning in cifs_smb3_do_mount() (CVE-2023-53230)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: storvsc: Fix handling of virtual Fibre Channel timeouts (CVE-2023-53245)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Return the firmware result upon destroying QP/RQ (CVE-2023-53286)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/client: Fix memory leak in drm_client_modeset_probe (CVE-2023-53288)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_rbtree: fix overlap expiration walk (CVE-2023-53304)

    In the Linux kernel, the following vulnerability has been resolved:

    nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput (CVE-2023-53311)

    In the Linux kernel, the following vulnerability has been resolved:

    fs/ntfs3: Enhance sanity check while generating attr_list (CVE-2023-53328)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: fix BUG_ON condition in btrfs_cancel_balance (CVE-2023-53339)

    In the Linux kernel, the following vulnerability has been resolved:

    ip6mr: Fix skb_under_panic in ip6mr_cache_report() (CVE-2023-53365)

    In the Linux kernel, the following vulnerability has been resolved:

    net: dcb: choose correct policy to parse DCB_ATTR_BCN (CVE-2023-53369)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Fix null-ptr-deref in unix_stream_sendpage(). (CVE-2023-53469)

    In the Linux kernel, the following vulnerability has been resolved:

    powerpc/rtas_flash: allow user copy to flash block cache objects (CVE-2023-53487)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: fix slab-use-after-free in decode_session6 (CVE-2023-53500)

    In the Linux kernel, the following vulnerability has been resolved:

    virtio-mmio: don't break lifecycle of vm_dev (CVE-2023-53515)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.10.192-182.736. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2023-039 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requests (CVE-2021-47391)

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in     net/netfilter/nf_tables_api.c.

    Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same     transaction causing a use-after-free vulnerability. This flaw allows a local attacker with user access to     cause a privilege escalation issue.

    We recommend upgrading past commit 1240eb93f0616b21c675416516ff3d74798fdc97. (CVE-2023-3390)

    The fix for XSA-423 added logic to Linux'es netback driver to deal witha frontend splitting a packet in a     way such that not all of the headerswould come in one piece.  Unfortunately the logic introduced     theredidn't account for the extreme case of the entire packet being splitinto as many pieces as permitted     by the protocol, yet still beingsmaller than the area that's specially dealt with to keep all     (possible)headers together.  Such an unusual packet would therefore trigger abuffer overrun in the driver.
    (CVE-2023-34319)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the     chain's owner rule can also release the objects in certain circumstances.

    We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8. (CVE-2023-3777)

    A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing     of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local     privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an     information disclosure. (CVE-2023-39194)

    An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux     kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.
    (CVE-2023-39197)

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    On an error when building a nftables rule, deactivating immediate expressions in     nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

    We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID (CVE-2023-4147)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

    In the Linux kernel before 6.4.12, amdgpu_cs_wait_all_fences in drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c has     a fence use-after-free. (CVE-2023-51042)

    In the Linux kernel before 6.4.5, drivers/gpu/drm/drm_atomic.c has a use-after-free during a race     condition between a nonblocking atomic commit and a driver unload. (CVE-2023-51043)

    In the Linux kernel, the following vulnerability has been resolved:

    SUNRPC: Fix UAF in svc_tcp_listen_data_ready() (CVE-2023-52885)

    In the Linux kernel, the following vulnerability has been resolved:

    can: bcm: Fix UAF in bcm_proc_show() (CVE-2023-52922)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: add NULL check in xfrm_update_ae_params (CVE-2023-53147)

    In the Linux kernel, the following vulnerability has been resolved:

    igb: Fix igb_down hung on surprise removal (CVE-2023-53148)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: qla2xxx: Pointer may be dereferenced (CVE-2023-53150)

    In the Linux kernel, the following vulnerability has been resolved:

    md/raid10: prevent soft lockup while flush writes (CVE-2023-53151)

    In the Linux kernel, the following vulnerability has been resolved:

    udf: Fix uninitialized array access for some pathnames (CVE-2023-53165)

    In the Linux kernel, the following vulnerability has been resolved:

    tracing: Fix null pointer dereference in tracing_err_log_open() (CVE-2023-53167)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix possible memory leak if device_add() fails (CVE-2023-53174)

    In the Linux kernel, the following vulnerability has been resolved:

    ipv6/addrconf: fix a potential refcount underflow for idev (CVE-2023-53189)

    In the Linux kernel, the following vulnerability has been resolved:

    vxlan: Fix nexthop hash size (CVE-2023-53192)

    In the Linux kernel, the following vulnerability has been resolved:

    sched/fair: Don't balance task to its current running CPU (CVE-2023-53215)

    In the Linux kernel, the following vulnerability has been resolved:

    nubus: Partially revert proc_create_single_data() conversion (CVE-2023-53217)

    In the Linux kernel, the following vulnerability has been resolved:

    jfs: jfs_dmap: Validate db_l2nbperpage while mounting (CVE-2023-53222)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: add handling for RAID1C23/DUP to btrfs_reduce_alloc_profile (CVE-2023-53243)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: storvsc: Fix handling of virtual Fibre Channel timeouts (CVE-2023-53245)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: qla2xxx: Remove unused nvme_ls_waitq wait queue (CVE-2023-53280)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Return the firmware result upon destroying QP/RQ (CVE-2023-53286)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/client: Fix memory leak in drm_client_modeset_probe (CVE-2023-53288)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_rbtree: fix overlap expiration walk (CVE-2023-53304)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/radeon: Fix integer overflow in radeon_cs_parser_init (CVE-2023-53309)

    In the Linux kernel, the following vulnerability has been resolved:

    nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput (CVE-2023-53311)

    In the Linux kernel, the following vulnerability has been resolved:

    md/raid10: fix wrong setting of max_corr_read_errors (CVE-2023-53313)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: qla2xxx: Wait for io return on terminate rport (CVE-2023-53322)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one (CVE-2023-53333)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: fix BUG_ON condition in btrfs_cancel_balance (CVE-2023-53339)

    In the Linux kernel, the following vulnerability has been resolved:

    icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev(). (CVE-2023-53343)

    In the Linux kernel, the following vulnerability has been resolved:

    md/raid10: check slab-out-of-bounds in md_bitmap_get_counter (CVE-2023-53357)

    In the Linux kernel, the following vulnerability has been resolved:

    ip6mr: Fix skb_under_panic in ip6mr_cache_report() (CVE-2023-53365)

    In the Linux kernel, the following vulnerability has been resolved:

    net: dcb: choose correct policy to parse DCB_ATTR_BCN (CVE-2023-53369)

    In the Linux kernel, the following vulnerability has been resolved:

    md/raid10: fix null-ptr-deref of mreplace in raid10_sync_request (CVE-2023-53380)

    In the Linux kernel, the following vulnerability has been resolved:

    shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs (CVE-2023-53391)

    In the Linux kernel, the following vulnerability has been resolved:

    PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free (CVE-2023-53446)

    In the Linux kernel, the following vulnerability has been resolved:

    FS: JFS: Fix null-ptr-deref Read in txBegin (CVE-2023-53457)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Fix null-ptr-deref in unix_stream_sendpage(). (CVE-2023-53469)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev (CVE-2023-53485)

    In the Linux kernel, the following vulnerability has been resolved:

    powerpc/rtas_flash: allow user copy to flash block cache objects (CVE-2023-53487)

    In the Linux kernel, the following vulnerability has been resolved:

    xfrm: fix slab-use-after-free in decode_session6 (CVE-2023-53500)

    In the Linux kernel, the following vulnerability has been resolved:

    virtio-mmio: don't break lifecycle of vm_dev (CVE-2023-53515)

    In the Linux kernel, the following vulnerability has been resolved:

    media: v4l2-mem2mem: add lock to protect parameter num_rdy (CVE-2023-53519)

    A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two     threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline     enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This     could allow a local unprivileged user to escalate their privileges on the system. (CVE-2023-6546)

    A denial of service vulnerability due to a deadlock was found in sctp_auto_asconf_init in     net/sctp/socket.c in the Linux kernel's SCTP subsystem. This flaw allows guests with local user privileges     to trigger a deadlock and potentially crash the system. (CVE-2024-0639)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.4.254-169.358. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2023-052 advisory.

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix possible memory leak if device_add() fails (CVE-2023-53174)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: storvsc: Fix handling of virtual Fibre Channel timeouts (CVE-2023-53245)

    In the Linux kernel, the following vulnerability has been resolved:

    nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput (CVE-2023-53311)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the linux package has been released.

ID	Name	Product	Family	Severity
265588	Linux Distros Unpatched Vulnerability : CVE-2023-53311	Nessus	Misc.	high
182628	Amazon Linux 2 : kernel, --advisory ALAS2-2023-2264 (ALAS-2023-2264)	Nessus	Amazon Linux Local Security Checks	high
181159	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-330)	Nessus	Amazon Linux Local Security Checks	high
180567	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2023-026 (ALASKERNEL-5.15-2023-026)	Nessus	Amazon Linux Local Security Checks	high
180566	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2023-039 (ALASKERNEL-5.10-2023-039)	Nessus	Amazon Linux Local Security Checks	high
180565	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2023-052 (ALASKERNEL-5.4-2023-052)	Nessus	Amazon Linux Local Security Checks	medium
153035	Photon OS 4.0: Linux PHSA-2021-4.0-0095	Nessus	PhotonOS Local Security Checks	high

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