In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted inodes were evicted; otherwise it cannot safely destroy the keyring. Since inodes that are in-use by the Landlock LSM don't get evicted until security_sb_delete(), this means that fscrypt_destroy_keyring() must be called *after* security_sb_delete(). This fixes a WARN_ON followed by a NULL dereference, only possible if Landlock was being used on encrypted files.

vendor_unpatched cve-2023-53055: Unpatched CVEs for Debian Linux, Ubuntu Linux (cve-2023-53055)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1054 advisory.

    A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking     configuration (redirecting egress packets to ingress using TC action mirred) a local unprivileged user     could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a     retransmission, resulting in a denial of service condition. (CVE-2022-4269)

    A NULL pointer dereference has been discovered in the Linux Kernel, in io_file_bitmap_get in     io_uring/filetable.c. (CVE-2023-1583)

    A use-after-free flaw was found in btrfs_search_slot in fs/btrfs/ctree.c in btrfs in the Linux Kernel.This     flaw allows an attacker to crash the system and possibly cause a kernel information lea (CVE-2023-1611)

    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)

    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:

    fscrypt: destroy keyring after security_sb_delete() (CVE-2023-53055)

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

    perf/x86/amd/core: Always clear status for idx (CVE-2023-53073)

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

    xsk: Add missing overflow check in xdp_umem_reg (CVE-2023-53080)

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

    nfsd: don't replace page in rq_pages if it's a continuation of last page (CVE-2023-53083)

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

    tracing: Do not let histogram values have some modifiers (CVE-2023-53093)

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 5.15.106-64.140. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2023-016 advisory.

    2025-07-03: CVE-2023-53055 was added to this advisory.

    2025-06-19: CVE-2023-53080 was added to this advisory.

    2025-06-19: CVE-2023-53053 was added to this advisory.

    2025-06-19: CVE-2023-53058 was added to this advisory.

    2025-06-19: CVE-2023-53079 was added to this advisory.

    2025-06-19: CVE-2023-53051 was added to this advisory.

    2024-07-03: CVE-2023-1611 was added to this advisory.

    A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking     configuration (redirecting egress packets to ingress using TC action mirred) a local unprivileged user     could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a     retransmission, resulting in a denial of service condition. (CVE-2022-4269)

    A use-after-free vulnerability was found in __nfs42_ssc_open() in fs/nfs/nfs4file.c in the Linux kernel.
    This flaw allows an attacker to conduct a remote denial of service. (CVE-2022-4379)

    A use-after-free flaw was found in btrfs_search_slot in fs/btrfs/ctree.c in btrfs in the Linux Kernel.This     flaw allows an attacker to crash the system and possibly cause a kernel information lea (CVE-2023-1611)

    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)

    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:

    fscrypt: destroy keyring after security_sb_delete() (CVE-2023-53055)

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

    net/mlx5: E-Switch, Fix an Oops in error handling code (CVE-2023-53058)

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

    net/mlx5: Fix steering rules cleanup (CVE-2023-53079)

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

    xsk: Add missing overflow check in xdp_umem_reg (CVE-2023-53080)

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
241778	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1054)	Nessus	Amazon Linux Local Security Checks	medium
174430	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2023-016)	Nessus	Amazon Linux Local Security Checks	high

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