In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp. After commit dbca1596bbb0 ("ping: convert to RCU lookups, get rid of rwlock"), we use RCU for ping sockets, but we should use spinlock for /proc/net/icmp to avoid a potential NULL deref mentioned in the previous patch. Let's go back to using spinlock there. Note we can convert ping sockets to use hlist instead of hlist_nulls because we do not use SLAB_TYPESAFE_BY_RCU for ping sockets.

The CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS-STREAM8:CLSA-2026:1789141176 advisory.

  - In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from     htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns
    -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket     silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current     bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY     when htab_lock_bucket() fails, and the application can retry or skip the busy batch as needed.
    (CVE-2022-50490)

  - In the Linux kernel, the following vulnerability has been resolved: scsi: hpsa: Fix possible memory leak     in hpsa_init_one() The hpda_alloc_ctlr_info() allocates h and its field reply_map. However, in     hpsa_init_one(), if alloc_percpu() failed, the hpsa_init_one() jumps to clean1 directly, which frees h and     leaks the h->reply_map. Fix by calling hpda_free_ctlr_info() to release h->replay_map and h instead free h     directly. (CVE-2022-50646)

  - The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The     ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL     MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the     TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to     the prctl syscall. The patch that added the support for the conditional mitigation via prctl     (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit     a664ec9158eeddd75121d39c9a0758016097fa96 (CVE-2023-0045)

  - 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)

  - In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix invalid page access after     closing deferred I/O devices When a fbdev with deferred I/O is once opened and closed, the dirty pages     still remain queued in the pageref list, and eventually later those may be processed in the delayed work.
    This may lead to a corruption of pages, hitting an Oops. This patch makes sure to cancel the delayed work     and clean up the pageref list at closing the device for addressing the bug. A part of the cleanup code is     factored out as a new helper function that is called from the common fb_release(). (CVE-2023-52731)

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

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

  - ping: Fix potentail NULL deref for /proc/net/icmp. After commit dbca1596bbb0 (ping: convert to RCU     lookups, get rid of rwlock), we use RCU for ping sockets, but we should use spinlock for /proc/net/icmp     to avoid a potential NULL deref mentioned in the previous patch. Let's go back to using spinlock there.
    Note we can convert ping sockets to use hlist instead of hlist_nulls because we do not use     SLAB_TYPESAFE_BY_RCU for ping sockets. (CVE-2023-53987)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-169 advisory.

    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:

    skbuff: Fix a race between coalescing and releasing SKBs (CVE-2023-53186)

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

    net: openvswitch: fix race on port output (CVE-2023-53188)

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

    raw: Fix NULL deref in raw_get_next(). (CVE-2023-53198)

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

    nfsd: call op_release, even when op_func returns an error (CVE-2023-53241)

    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:

    cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex (CVE-2023-53522)

    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:

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

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

    bpf, arm64: Fixed a BTI error on returning to patched function (CVE-2023-53634)

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

    NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL (CVE-2023-53680)

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

    netlink: annotate lockless accesses to nlk->max_recvmsg_len (CVE-2023-53824)

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

    ping: Fix potentail NULL deref for /proc/net/icmp. (CVE-2023-53987)

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

    RDMA/core: Fix GID entry ref leak when create_ah fails (CVE-2023-54003)

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

    io_uring: fix memory leak when removing provided buffers (CVE-2023-54041)

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

    fs: drop peer group ids under namespace lock (CVE-2023-54128)

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

    mptcp: stricter state check in mptcp_worker (CVE-2023-54176)

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

    drm/i915: fix race condition UAF in i915_perf_add_config_ioctl (CVE-2023-54202)

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

    ipv6: Fix an uninit variable access bug in __ip6_make_skb() (CVE-2023-54265)

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	Type	Severity
361969	CentOS Linux 8 [TuxCare] Security Update: bpftool / kernel / kernel-core / kernel-cross-headers / etc Multiple Vulnerabilities (CENTOS-STREAM8:CLSA-2026:1789141176)	Nessus	CentOS Local Security Checks	Local	high
279977	Linux Distros Unpatched Vulnerability : CVE-2023-53987	Nessus	Misc.	Local	medium
175085	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-169)	Nessus	Amazon Linux Local Security Checks	Local	high

Detections

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CVE-2023-53987

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Tenable Plugins

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medium

high