In the Linux kernel, the following vulnerability has been resolved: mm/slab_common: fix slab_caches list corruption after kmem_cache_destroy() After the commit in Fixes:, if a module that created a slab cache does not release all of its allocated objects before destroying the cache (at rmmod time), we might end up releasing the kmem_cache object without removing it from the slab_caches list thus corrupting the list as kmem_cache_destroy() ignores the return value from shutdown_cache(), which in turn never removes the kmem_cache object from slabs_list in case __kmem_cache_shutdown() fails to release all of the cache's slabs. This is easily observable on a kernel built with CONFIG_DEBUG_LIST=y as after that ill release the system will immediately trip on list_add, or list_del, assertions similar to the one shown below as soon as another kmem_cache gets created, or destroyed: [ 1041.213632] list_del corruption. next->prev should be ffff89f596fb5768, but was 52f1e5016aeee75d. (next=ffff89f595a1b268) [ 1041.219165] ------------[ cut here ]------------ [ 1041.221517] kernel BUG at lib/list_debug.c:62! [ 1041.223452] invalid opcode: 0000 [#1] PREEMPT SMP PTI [ 1041.225408] CPU: 2 PID: 1852 Comm: rmmod Kdump: loaded Tainted: G B W OE 6.5.0 #15 [ 1041.228244] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023 [ 1041.231212] RIP: 0010:__list_del_entry_valid+0xae/0xb0 Another quick way to trigger this issue, in a kernel with CONFIG_SLUB=y, is to set slub_debug to poison the released objects and then just run cat /proc/slabinfo after removing the module that leaks slab objects, in which case the kernel will panic: [ 50.954843] general protection fault, probably for non-canonical address 0xa56b6b6b6b6b6b8b: 0000 [#1] PREEMPT SMP PTI [ 50.961545] CPU: 2 PID: 1495 Comm: cat Kdump: loaded Tainted: G B W OE 6.5.0 #15 [ 50.966808] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023 [ 50.972663] RIP: 0010:get_slabinfo+0x42/0xf0 This patch fixes this issue by properly checking shutdown_cache()'s return value before taking the kmem_cache_release() branch.

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

  - In the Linux kernel, the following vulnerability has been resolved: mm/slab_common: fix slab_caches list     corruption after kmem_cache_destroy() After the commit in Fixes:, if a module that created a slab cache     does not release all of its allocated objects before destroying the cache (at rmmod time), we might end up     releasing the kmem_cache object without removing it from the slab_caches list thus corrupting the list as     kmem_cache_destroy() ignores the return value from shutdown_cache(), which in turn never removes the     kmem_cache object from slabs_list in case __kmem_cache_shutdown() fails to release all of the cache's     slabs. This is easily observable on a kernel built with CONFIG_DEBUG_LIST=y as after that ill release the     system will immediately trip on list_add, or list_del, assertions similar to the one shown below as soon     as another kmem_cache gets created, or destroyed: [ 1041.213632] list_del corruption. next->prev should be     ffff89f596fb5768, but was 52f1e5016aeee75d. (next=ffff89f595a1b268) [ 1041.219165] ------------[ cut here     ]------------ [ 1041.221517] kernel BUG at lib/list_debug.c:62! [ 1041.223452] invalid opcode: 0000 [#1]     PREEMPT SMP PTI [ 1041.225408] CPU: 2 PID: 1852 Comm: rmmod Kdump: loaded Tainted: G B W OE 6.5.0 #15 [     1041.228244] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023 [     1041.231212] RIP: 0010:__list_del_entry_valid+0xae/0xb0 Another quick way to trigger this issue, in a     kernel with CONFIG_SLUB=y, is to set slub_debug to poison the released objects and then just run cat     /proc/slabinfo after removing the module that leaks slab objects, in which case the kernel will panic: [     50.954843] general protection fault, probably for non-canonical address 0xa56b6b6b6b6b6b8b: 0000 [#1]     PREEMPT SMP PTI [ 50.961545] CPU: 2 PID: 1495 Comm: cat Kdump: loaded Tainted: G B W OE 6.5.0 #15 [     50.966808] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023 [     50.972663] RIP: 0010:get_slabinfo+0x42/0xf0 This patch fixes this issue by properly checking     shutdown_cache()'s return value before taking the kmem_cache_release() branch. (CVE-2023-52562)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7539 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

    * kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and     cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

    * kernel: netfilter: potential slab-out-of-bound access due to integer underflow (CVE-2023-42753)

    * hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982)

    * kernel: use-after-free due to race condition occurring in dvb_register_device() (CVE-2022-45884)

    * kernel: use-after-free due to race condition occurring in dvb_net.c (CVE-2022-45886)

    * kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c (CVE-2022-45919)

    * kernel: Race between task migrating pages and another task calling exit_mmap to release those same pages     getting invalid opcode BUG in include/linux/swapops.h (CVE-2023-4732)

    * kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment     (CVE-2023-38409)

    * kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Intel 8.8 BUG SPR IOMMU: QAT Device Address Translation Issue with Invalidation Completion Ordering     (BZ#2221097)

    * RHEL 8.9: intel_pstate may provide incorrect scaling values for hybrid capable systems with E-cores     disabled (BZ#2223403)

    * Bring MD code inline with upstream (BZ#2235655)

    * NAT sport clash in OCP causing 1 second TCP connection establishment delay. (BZ#2236514)

    * ibmvnic: NONFATAL reset causes dql BUG_ON crash (BZ#2236701)

    * PVT:1050:NXGZIP: LPM of RHEL client lpar got failed with error HSCLA2CF in 19th loops (BZ#2236703)

    * xfs: mount fails when device file name is long (BZ#2236813)

    * NFSv4.0 client hangs when server reboot while client had outstanding lock request to the server     (BZ#2237840)

    * i40e: backport selected bugfixes (BZ#2238305)

    * Updates for NFS/NFSD/SUNRPC for RHEL 8.9 (BZ#2238394)

    * SCSI updates for RHEL 8.9 (BZ#2238770)

    * kernel: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35 at:
    sock_map_update_elem_sys+0x85/0x2a0 (BZ#2239475)

    * Random delay receiving packets after bringing up VLAN on top of VF with vf-vlan-pruning enabled     (BZ#2240751)

    * RHEL-8.9 RDMA/restrack: Release MR restrack when delete (BZ#2244423)

    Enhancement(s):

    * Intel 8.9 FEAT EMR power: Add EMR CPU support to intel_rapl driver (BZ#2230146)

    * Intel 8.9 FEAT EMR tools: Add EMR CPU support to turbostat (BZ#2230154)

    * Intel 8.9 FEAT EMR power: Add EMR support to the intel_idle driver (BZ#2230155)

    * Intel 8.9 FEAT EMR RAS: Add EDAC support for EMR (BZ#2230161)

    * Intel 8.9 FEAT general: intel-speed-select (ISST): Update to latest release (BZ#2230163)

    * Intel 8.9 FEAT cpufreq: intel_pstate: Enable HWP IO boost for all servers (BZ#2232123)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0448 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe     (CVE-2023-2163)

    * kernel: use after free in unix_stream_sendpage (CVE-2023-4622)

    * kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)

    * kernel: eBPF: insufficient stack type checks in dynptr (CVE-2023-39191)

    * kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)

    * kernel: nfp: use-after-free in area_cache_get() (CVE-2022-3545)

    * kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip (CVE-2022-41858)

    * kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)

    * kernel: NULL pointer dereference in can_rcv_filter (CVE-2023-2166)

    * kernel: Slab-out-of-bound read in compare_netdev_and_ip (CVE-2023-2176)

    * kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race (CVE-2023-3567)

    * kernel: use-after-free in netfilter: nf_tables (CVE-2023-3777)

    * kernel: use after free in nft_immediate_deactivate (CVE-2023-4015)

    * kernel: A heap out-of-bounds write (CVE-2023-5717)

    * hw amd: Return Address Predictor vulnerability leading to information disclosure (CVE-2023-20569)

    * kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment     (CVE-2023-38409)

    * kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (CVE-2023-40283)

    * kernel: SEV-ES local priv escalation (CVE-2023-46813)

    * kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

    * kernel: NULL pointer dereference in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c     (CVE-2023-6679)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * sev-guest is not loaded automatically in the guest kernel when sev-snp is enabled (BZ#2218934)

    * Cgroups v2: Current interface to disable cpu load balancing not compatible with kubernetes cgroup     hierarchy (BZ#2238754)

    * WPC ice driver misc irq not getting generated for a interface. (BZ#2245881)

    * RHEL9.0 - s390/qeth: NET2016 - fix use-after-free in HSCI (BZ#2247798)

    * pNFS/filelayout: treat GETDEVICEINFO errors as layout failure (BZ#2249557)

    * cifs: fix dentry lookups in directory handle cache (BZ#2249558)

    * Performance regression with random 2 KiB writes to ext4 filesystem with 4 KiB filesystem blocks     (BZ#2249685)

    * kernel.spec: Fix UKI naming to comply with BLS (BZ#2254546)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7549 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe     (CVE-2023-2163)

    * kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags (CVE-2023-3812)

    * kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

    * kernel: use-after-free due to race condition occurring in dvb_register_device() (CVE-2022-45884)

    * kernel: use-after-free due to race condition occurring in dvb_net.c (CVE-2022-45886)

    * kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c (CVE-2022-45919)

    * kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Random delay receiving packets after bringing up VLAN on top of VF with vf-vlan-pruning enabled     (BZ#2240750)

    * bpf_jit_limit hit again (BZ#2243011)

    * HPE Edgeline 920t resets during kdump context when ice driver is loaded and when system is booted with     intel_iommu=on iommu=pt (BZ#2244625)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 ALAS2023-2023-385 advisory.

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

    ceph: drop messages from MDS when unmounting (CVE-2022-48628)

    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)

    A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was     assumed to be associated with a device before calling __ip_options_compile, which is not always the case     if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash     the system. (CVE-2023-42754)

    A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD     and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`.
    This issue may allow a local user to crash the system. (CVE-2023-42756)

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

    Addition and removal of rules from chain bindings within the same transaction causes leads to use-after-     free.

    We recommend upgrading past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325. (CVE-2023-5197)

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

    netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction

    New elements in this transaction might expired before such transactionends. Skip sync GC for such elements     otherwise commit path might walkover an already released object. Once transaction is finished, async     GCwill collect such expired element. (CVE-2023-52433)

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

    x86/srso: Add SRSO mitigation for Hygon processors (CVE-2023-52482)

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

    ring-buffer: Do not attempt to read past commit (CVE-2023-52501)

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

    mm/slab_common: fix slab_caches list corruption after kmem_cache_destroy() (CVE-2023-52562)

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

    serial: 8250_port: Check IRQ data before use (CVE-2023-52567)

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

    btrfs: remove BUG() after failure to insert delayed dir index item (CVE-2023-52569)

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

    cifs: Fix UAF in cifs_demultiplex_thread() (CVE-2023-52572)

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

    net: rds: Fix possible NULL-pointer dereference (CVE-2023-52573)

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

    team: fix null-ptr-deref when team device type is changed (CVE-2023-52574)

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

    x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer() (CVE-2023-52576)

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

    net: bridge: use DEV_STATS_INC() (CVE-2023-52578)

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

    net/core: Fix ETH_P_1588 flow dissector (CVE-2023-52580)

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

    netfs: Only call folio_start_fscache() one time for each folio (CVE-2023-52582)

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

    netfilter: nf_tables: adapt set backend to use GC transaction API (CVE-2023-52923)

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

    netfilter: nf_tables: don't skip expired elements during walk (CVE-2023-52924)

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

    In case of an error in smb3_fs_context_parse_param, ctx->password was freed but the field was not set to     NULL which could lead to double free.

    We recommend upgrading past commit e6e43b8aa7cd3c3af686caf0c2e11819a886d705. (CVE-2023-5345)

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.

ID	Name	Product	Family	Severity
226510	Linux Distros Unpatched Vulnerability : CVE-2023-52562	Nessus	Misc.	medium
189642	RHEL 8 : kernel (RHSA-2023:7539)	Nessus	Red Hat Local Security Checks	high
189552	RHEL 9 : kernel (RHSA-2024:0448)	Nessus	Red Hat Local Security Checks	high
186369	RHEL 8 : kernel (RHSA-2023:7549)	Nessus	Red Hat Local Security Checks	high
183798	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-385)	Nessus	Amazon Linux Local Security Checks	high

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CVE-2023-52562

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