{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53225: sctp: fix uninit-value in __sctp_rcv_asconf_lookup()","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53225","status":"final","version":"1","initial_release_date":"2026-06-25T08:39:25.911Z","current_release_date":"2026-06-28T06:40:37.092Z","revision_history":[{"date":"2026-06-25T08:39:25.911Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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->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\").","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53225 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53225"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53225"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce"}]},"product_tree":{"branches":[{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <446e0ecd845abc394b24ae2030a883572bec9d16","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <446e0ecd845abc394b24ae2030a883572bec9d16","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <928dd94db23e8ba340f83d68f7f24d831b7a4426","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <928dd94db23e8ba340f83d68f7f24d831b7a4426","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <d796cfd06074b579d265b28401306cadd30db945","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <d796cfd06074b579d265b28401306cadd30db945","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <8ce96f1182644079249a24ac7e2ffc32e0301a46","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <8ce96f1182644079249a24ac7e2ffc32e0301a46","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <d6bd0bb7697ea8c0387b0d9d973453f479017b23","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <d6bd0bb7697ea8c0387b0d9d973453f479017b23","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <f76a8b323e28e0951f979dbef20a7496383c47df","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <f76a8b323e28e0951f979dbef20a7496383c47df","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <8e86817b8af4d552f3c6fe04ca52bb0c8c57411d","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <8e86817b8af4d552f3c6fe04ca52bb0c8c57411d","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=df21857714398acb8b24a8bb5a6d2286dd9c59ef <f8373d7090b745728de66308deeecc67e8d319ce","product":{"name":"Linux Linux >=df21857714398acb8b24a8bb5a6d2286dd9c59ef <f8373d7090b745728de66308deeecc67e8d319ce","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version","name":"2.6.25","product":{"name":"Linux Linux 2.6.25","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"0","product":{"name":"Linux Linux 0","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.10.259","product":{"name":"Linux Linux 5.10.259","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.15.210","product":{"name":"Linux Linux 5.15.210","product_id":"CSAFPID-12","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.1.176","product":{"name":"Linux Linux 6.1.176","product_id":"CSAFPID-13","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.6.143","product":{"name":"Linux Linux 6.6.143","product_id":"CSAFPID-14","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.12.94","product":{"name":"Linux Linux 6.12.94","product_id":"CSAFPID-15","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.18.36","product":{"name":"Linux Linux 6.18.36","product_id":"CSAFPID-16","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.0.13","product":{"name":"Linux Linux 7.0.13","product_id":"CSAFPID-17","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.1","product":{"name":"Linux Linux 7.1","product_id":"CSAFPID-18","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.25:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53225","title":"sctp: fix uninit-value in __sctp_rcv_asconf_lookup()","notes":[{"category":"description","text":"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->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\").","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"],"fixed":["CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14","CSAFPID-15","CSAFPID-16","CSAFPID-17","CSAFPID-18"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 0, 446e0ecd845abc394b24ae2030a883572bec9d16, 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1, 8ce96f1182644079249a24ac7e2ffc32e0301a46, 8e86817b8af4d552f3c6fe04ca52bb0c8c57411d, 928dd94db23e8ba340f83d68f7f24d831b7a4426, d6bd0bb7697ea8c0387b0d9d973453f479017b23, d796cfd06074b579d265b28401306cadd30db945, f76a8b323e28e0951f979dbef20a7496383c47df, f8373d7090b745728de66308deeecc67e8d319ce.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}]}]}