In the Linux kernel, the following vulnerability has been resolved: sctp: validate embedded INIT chunk and address list lengths in cookie sctp_unpack_cookie() only checked that the embedded INIT chunk length did not exceed the remaining cookie payload, but did not ensure that the INIT chunk is large enough to contain a complete INIT header. A malformed COOKIE_ECHO can therefore carry a truncated INIT chunk whose length field is smaller than sizeof(struct sctp_init_chunk). Later, sctp_process_init() accesses INIT parameters unconditionally, which may lead to out-of-bounds reads. In addition, raw_addr_list_len is not fully validated against the remaining cookie payload. When cookie authentication is disabled, an attacker can supply an oversized raw_addr_list_len and cause sctp_raw_to_bind_addrs() to read beyond the end of the cookie. The address parser also lacks sufficient bounds checks for parameter headers and lengths, allowing malformed address parameters to trigger out-of-bounds reads. Fix this by: - requiring the embedded INIT chunk length to be at least sizeof(struct sctp_init_chunk); - validating that the INIT chunk and raw address list together fit within the cookie payload; - verifying sufficient data exists for each address parameter header and payload before parsing it. Note that sctp_verify_init() must be called after sctp_unpack_cookie() and before sctp_process_init() when cookie authentication is disabled. This will be addressed in a separate patch.

An update of the linux package has been released.

The version of kernel installed on the remote host is prior to 5.10.260-259.1061. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2026-128 advisory.

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

    ipv6: use RCU in ip6_output() (CVE-2025-40158)

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

    xfrm: Wait for RCU readers during policy netns exit (CVE-2026-43091)

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

    sched/psi: fix race between file release and pressure write (CVE-2026-52991)

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

    sctp: validate embedded INIT chunk and address list lengths in cookie (CVE-2026-53224)

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

  - sctp: validate embedded INIT chunk and address list lengths in cookie sctp_unpack_cookie() only checked     that the embedded INIT chunk length did not exceed the remaining cookie payload, but did not ensure that     the INIT chunk is large enough to contain a complete INIT header. A malformed COOKIE_ECHO can therefore     carry a truncated INIT chunk whose length field is smaller than sizeof(struct sctp_init_chunk). Later,     sctp_process_init() accesses INIT parameters unconditionally, which may lead to out-of-bounds reads. In     addition, raw_addr_list_len is not fully validated against the remaining cookie payload. When cookie     authentication is disabled, an attacker can supply an oversized raw_addr_list_len and cause     sctp_raw_to_bind_addrs() to read beyond the end of the cookie. The address parser also lacks sufficient     bounds checks for parameter headers and lengths, allowing malformed address parameters to trigger out-of-     bounds reads. Fix this by: - requiring the embedded INIT chunk length to be at least sizeof(struct     sctp_init_chunk); - validating that the INIT chunk and raw address list together fit within the cookie     payload; - verifying sufficient data exists for each address parameter header and payload before parsing     it. Note that sctp_verify_init() must be called after sctp_unpack_cookie() and before sctp_process_init()     when cookie authentication is disabled. This will be addressed in a separate patch. (CVE-2026-53224)

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

ID	Name	Product	Family	Severity
334126	Photon OS 5.0: Linux PHSA-2026-5.0-92-0931	Nessus	PhotonOS Local Security Checks	critical
332011	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-128 (ALASKERNEL-5.10-2026-128)	Nessus	Amazon Linux Local Security Checks	critical
331915	Photon OS 5.0: Linux PHSA-2026-5.0-0931	Nessus	PhotonOS Local Security Checks	critical
329149	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:3166-1)	Nessus	SuSE Local Security Checks	medium
327383	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1925)	Nessus	Amazon Linux Local Security Checks	high
323363	Linux Distros Unpatched Vulnerability : CVE-2026-53224	Nessus	Misc.	critical

Detections

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CVE-2026-53224

critical

Tenable Plugins

critical

critical

critical

medium

high

critical