In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.

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

  - nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of     nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially     causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to     sc_task member of struct nilfs_sc_info to indicate the thread has finished, and then notifies     nilfs_segctor_kill_thread() of this using waitqueue sc_wait_task on the struct nilfs_sc_info. However,     here, immediately after the NULL assignment to sc_task, it is possible that nilfs_segctor_kill_thread()     will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the     thread does the notification. This fixes the issue by protecting the NULL assignment to sc_task and its     notification, with spinlock sc_state_lock of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread()     does a final check to see if sc_task is NULL with sc_state_lock locked, this can eliminate the race.
    (CVE-2023-53608)

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 4.14.313-235.533. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2027 advisory.

    A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network     subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash the     system, and could even lead to a kernel information leak problem. (CVE-2023-1838)

    An insufficient permission check has been found in the Bluetooth subsystem ofthe Linux kernel when     handling ioctl system calls of HCI sockets. This causestasks without the proper CAP_NET_ADMIN capability     can easily mark HCI socketsas _trusted_. Trusted sockets are intended to enable the sending and     receivingof management commands and events, such as pairing or connecting with a newdevice.  As a result,     unprivileged users can acquire a trusted socket, leadingto unauthorized execution of management commands.
    The exploit requires onlythe presence of a set of commonly used setuid programs (e.g., su, sudo).
    (CVE-2023-2002)

    An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores     an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or     potentially escalate their privileges on the system. (CVE-2023-2124)

    An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The     userspace data->block[0] variable was not capped to a number between 0-255 and was used as the size of a     memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to     crash the system or potentially achieve code execution. (CVE-2023-2194)

    cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial     of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes     indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)

    The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in     drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device.
    (CVE-2023-33203)

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

    nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy() (CVE-2023-53035)

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

    dm stats: check for and propagate alloc_percpu failure (CVE-2023-53044)

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

    dm crypt: add cond_resched() to dmcrypt_write() (CVE-2023-53051)

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

    igb: revert rtnl_lock() that causes deadlock (CVE-2023-53060)

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

    net: usb: smsc95xx: Limit packet length to skb->len (CVE-2023-53062)

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

    scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate() (CVE-2023-53078)

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

    ocfs2: fix data corruption after failed write (CVE-2023-53081)

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

    cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL (CVE-2023-53246)

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

    nilfs2: fix sysfs interface lifetime (CVE-2023-53440)

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

    nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() (CVE-2023-53608)

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

    mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() (CVE-2023-53623)

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 5.4.241-150.347. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2023-044 advisory.

    A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that     allows local users to create files for the XFS file-system with an unintended group ownership and with     group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a     certain group and is writable by a user who is not a member of this group. This can lead to excessive     permissions granted in case when they should not.  This vulnerability is similar to the previous     CVE-2018-13405 and adds the missed fix for the XFS. (CVE-2021-4037)

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

    tun: avoid double free in tun_free_netdev (CVE-2021-47082)

    A double-free flaw was found in the Linux kernel's TUN/TAP device driver functionality in how a user     registers the device when the register_netdevice function fails (NETDEV_REGISTER notifier). This flaw     allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-4744)

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

    gfs2: Always check inode size of inline inodes (CVE-2022-49739)

    A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race     problem. This flaw leads to a denial of service issue. (CVE-2023-0590)

    An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores     an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or     potentially escalate their privileges on the system. (CVE-2023-2124)

    An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The     userspace data->block[0] variable was not capped to a number between 0-255 and was used as the size of a     memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to     crash the system or potentially achieve code execution. (CVE-2023-2194)

    do_tls_getsockopt in net/tls/tls_main.c in the Linux kernel through 6.2.6 lacks a lock_sock call, leading     to a race condition (with a resultant use-after-free or NULL pointer dereference). (CVE-2023-28466)

    The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in     drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device.
    (CVE-2023-33203)

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

    nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy() (CVE-2023-53035)

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

    scsi: qla2xxx: Perform lockless command completion in abort path (CVE-2023-53041)

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

    dm stats: check for and propagate alloc_percpu failure (CVE-2023-53044)

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

    dm crypt: add cond_resched() to dmcrypt_write() (CVE-2023-53051)

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

    erspan: do not use skb_mac_header() in ndo_start_xmit() (CVE-2023-53053)

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

    igb: revert rtnl_lock() that causes deadlock (CVE-2023-53060)

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

    net: usb: smsc95xx: Limit packet length to skb->len (CVE-2023-53062)

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

    qed/qed_sriov: guard against NULL derefs from qed_iov_get_vf_info (CVE-2023-53066)

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

    scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate() (CVE-2023-53078)

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

    ocfs2: fix data corruption after failed write (CVE-2023-53081)

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

    cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL (CVE-2023-53246)

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

    sctp: check send stream number after wait_for_sndbuf (CVE-2023-53296)

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

    can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write (CVE-2023-53344)

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

    sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)

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

    tracing: Free error logs of tracing instances (CVE-2023-53375)

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

    nilfs2: fix sysfs interface lifetime (CVE-2023-53440)

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

    nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() (CVE-2023-53608)

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

    mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() (CVE-2023-53623)

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 5.10.178-162.673. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2023-031 advisory.

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

    sysctl: Fix data-races in proc_dou8vec_minmax(). (CVE-2022-49634)

    An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores     an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or     potentially escalate their privileges on the system. (CVE-2023-2124)

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

    Drivers: vmbus: Check for channel allocation before looking up relids (CVE-2023-53273)

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

    sctp: check send stream number after wait_for_sndbuf (CVE-2023-53296)

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

    sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)

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

    tracing: Free error logs of tracing instances (CVE-2023-53375)

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

    nilfs2: fix sysfs interface lifetime (CVE-2023-53440)

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

    scsi: iscsi_tcp: Check that sock is valid before iscsi_set_param() (CVE-2023-53464)

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

    RDMA/cma: Allow UD qp_type to join multicast only (CVE-2023-53525)

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

    nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() (CVE-2023-53608)

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

    mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() (CVE-2023-53623)

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
269317	Linux Distros Unpatched Vulnerability : CVE-2023-53608	Nessus	Misc.	medium
175018	Amazon Linux 2 : kernel, --advisory ALAS2-2023-2027 (ALAS-2023-2027)	Nessus	Amazon Linux Local Security Checks	high
174976	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2023-044 (ALASKERNEL-5.4-2023-044)	Nessus	Amazon Linux Local Security Checks	high
174973	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2023-031 (ALASKERNEL-5.10-2023-031)	Nessus	Amazon Linux Local Security Checks	high
153035	Photon OS 4.0: Linux PHSA-2021-4.0-0095	Nessus	PhotonOS Local Security Checks	high

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