UBUNTU-CVE-2026-53225

Dashboard / Vulnerabilities / UBUNTU-CVE-2026-53225

UBUNTU-CVE-2026-53225

Summary:

Details: In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").

References: https://ubuntu.com/security/CVE-2026-53225, https://www.cve.org/CVERecord?id=CVE-2026-53225, https://git.kernel.org/linus/f8373d7090b745728de66308deeecc67e8d319ce, https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16, https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46, https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d, https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426, https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23, https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945, https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df, https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce, https://ubuntu.com/security/notices/USN-8629-1, https://ubuntu.com/security/notices/USN-8630-1, https://ubuntu.com/security/notices/USN-8631-1, https://ubuntu.com/security/notices/USN-8633-1, https://ubuntu.com/security/notices/USN-8634-1, https://ubuntu.com/security/notices/USN-8635-1, https://ubuntu.com/security/notices/USN-8636-1, https://ubuntu.com/security/notices/USN-8630-2, https://ubuntu.com/security/notices/USN-8631-2, https://ubuntu.com/security/notices/USN-8637-1, https://ubuntu.com/security/notices/USN-8631-3, https://ubuntu.com/security/notices/USN-8633-2, https://ubuntu.com/security/notices/USN-8629-2, https://ubuntu.com/security/notices/USN-8631-4, https://ubuntu.com/security/notices/USN-8645-1, https://ubuntu.com/security/notices/USN-8629-3, https://ubuntu.com/security/notices/USN-8630-3, https://ubuntu.com/security/notices/USN-8636-2, https://ubuntu.com/security/notices/USN-8656-1, https://ubuntu.com/security/notices/USN-8660-1, https://ubuntu.com/security/notices/USN-8661-1, https://ubuntu.com/security/notices/USN-8630-4, https://ubuntu.com/security/notices/USN-8662-1, https://ubuntu.com/security/notices/USN-8663-1, https://ubuntu.com/security/notices/USN-8664-1, https://ubuntu.com/security/notices/USN-8662-2, https://ubuntu.com/security/notices/USN-8669-1, https://ubuntu.com/security/notices/USN-8661-2, https://ubuntu.com/security/notices/USN-8630-5, https://ubuntu.com/security/notices/USN-8661-3, https://ubuntu.com/security/notices/USN-8661-4, https://ubuntu.com/security/notices/USN-8714-1, https://ubuntu.com/security/notices/USN-8715-1, https://ubuntu.com/security/notices/USN-8714-2, https://ubuntu.com/security/notices/USN-8728-1, https://ubuntu.com/security/notices/USN-8714-3, https://ubuntu.com/security/notices/USN-8715-2, https://ubuntu.com/security/notices/USN-8661-5, https://ubuntu.com/security/notices/USN-8728-2