{"id":"CVE-2026-53225","title":"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 p…","summary":"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 p…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-908"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.25, < 5.10.259","linux_kernel >= 5.11, < 5.15.210","linux_kernel >= 5.16, < 6.1.176","linux_kernel >= 6.2, < 6.6.143","linux_kernel >= 6.7, < 6.12.94","linux_kernel >= 6.13, < 6.18.36","linux_kernel >= 6.19, < 7.0.13","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.13"],"published":"2026-06-25","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53225","references":[{"url":"https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00735,"epssPercentile":0.52418,"ingestedAt":"2026-07-03T13:02:28.067Z","slug":"CVE-2026-53225","body":"## Overview\n\nIn 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->from_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\").\n\n## Affected\n\n- `linux_kernel >= 2.6.25, < 5.10.259`\n- `linux_kernel >= 5.11, < 5.15.210`\n- `linux_kernel >= 5.16, < 6.1.176`\n- `linux_kernel >= 6.2, < 6.6.143`\n- `linux_kernel >= 6.7, < 6.12.94`\n- `linux_kernel >= 6.13, < 6.18.36`\n- `linux_kernel >= 6.19, < 7.0.13`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.13`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}