{"id":"CVE-2026-63971","revision":"04db9f8f2309483f8a20eb0f7d598e63","records":[{"revision":"04db9f8f2309483f8a20eb0f7d598e63","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63971","aliases":[],"title":"sctp: fix race between sctp_wait_for_connect and peeloff","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix race between sctp_wait_for_connect and peeloff\n\nsctp_wait_for_connect() drops and re-acquires the socket lock while\nwaiting for the association to reach ESTABLISHED state. During this\nwindow, another thread can peeloff the association to a new socket via\ngetsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After\nre-acquiring the old socket lock, sctp_wait_for_connect() returns\nsuccess without noticing the migration — the caller then accesses\nthe association under the wrong lock in sctp_datamsg_from_user().\n\nAdd the same sk != asoc->base.sk check that sctp_wait_for_sndbuf()\nalready has, returning an error if the association was migrated while\nwe slept.","state":0,"publishedAt":"2026-07-19T14:55:57.792+00:00","modifiedAt":"2026-10-19T20:17:59.44+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sctp/socket.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"bcfeac79af740735ace44008b4a11b8e5add20f5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"8e9b56051d24540cfbf39194618708c4a7633549\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"634a9af8a26a84d8b0d7b3b643204b344b42d9fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"7d2038d4b80166f7bead8d07eba3b97405816c21\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"68667ee4c7dadf7f63167234e2a1af09b3f7874e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"6140cfa721451fa6e18e134e709703c2bf34d0fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668c9beb9020d5834ee9e43c208190a07d2b1928\",\n                            \"lessThan\": \"f14fe6395a8b3d961a61e138ad7b36ba3626dd4e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sctp/socket.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.259\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.210\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.93\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.35\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.12\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d","https://git.kernel.org/stable/c/bcfeac79af740735ace44008b4a11b8e5add20f5","https://git.kernel.org/stable/c/8e9b56051d24540cfbf39194618708c4a7633549","https://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fb","https://git.kernel.org/stable/c/7d2038d4b80166f7bead8d07eba3b97405816c21","https://git.kernel.org/stable/c/68667ee4c7dadf7f63167234e2a1af09b3f7874e","https://git.kernel.org/stable/c/6140cfa721451fa6e18e134e709703c2bf34d0fb","https://git.kernel.org/stable/c/f14fe6395a8b3d961a61e138ad7b36ba3626dd4e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63971","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63971","identifiers":["CVE-2026-63971"]},"retained":false,"historicalAffected":[]}],"coverage":[]}