{"id":"CVE-2026-53225","summary":"sctp: fix uninit-value in __sctp_rcv_asconf_lookup()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix uninit-value in __sctp_rcv_asconf_lookup()\n\n__sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF\nchunk can hold the ADDIP header and a parameter header, then calls\naf-\u003efrom_addr_param(), which reads the full address (16 bytes for IPv6)\ntrusting the parameter's declared length.\n\nAn unauthenticated peer can send a truncated trailing ASCONF chunk that\ndeclares an IPv6 address parameter but stops after the 4-byte parameter\nheader; reached from the no-association lookup path, from_addr_param() then\nreads uninitialized bytes past the parameter.\n\nImpact: an unauthenticated SCTP peer makes the receive path read up to 16\nbytes of uninitialized memory past a truncated ASCONF address parameter.\n\nThe sibling __sctp_rcv_init_lookup() bounds parameters with\nsctp_walk_params(); this path open-codes the fetch and omits the bound.\nVerify the whole address parameter lies within the chunk before\nfrom_addr_param() reads it, the same class of fix as commit 51e5ad549c43\n(\"net: sctp: fix KMSAN uninit-value in sctp_inq_pop\").","modified":"2026-07-08T08:13:44.206287762Z","published":"2026-06-25T08:39:25.911Z","related":["CGA-4j63-6c75-8chj"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53225.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53225.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53225"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"df21857714398acb8b24a8bb5a6d2286dd9c59ef"},{"fixed":"446e0ecd845abc394b24ae2030a883572bec9d16"},{"fixed":"928dd94db23e8ba340f83d68f7f24d831b7a4426"},{"fixed":"d796cfd06074b579d265b28401306cadd30db945"},{"fixed":"8ce96f1182644079249a24ac7e2ffc32e0301a46"},{"fixed":"d6bd0bb7697ea8c0387b0d9d973453f479017b23"},{"fixed":"f76a8b323e28e0951f979dbef20a7496383c47df"},{"fixed":"8e86817b8af4d552f3c6fe04ca52bb0c8c57411d"},{"fixed":"f8373d7090b745728de66308deeecc67e8d319ce"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53225.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.25"},{"fixed":"5.10.259"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.210"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.94"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53225.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}