{"id":"CVE-2026-52929","revision":"3c18920e903c497f8a5ebfd37104bc8b","records":[{"revision":"3c18920e903c497f8a5ebfd37104bc8b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52929","aliases":[],"title":"sctp: stream: fully roll back denied add-stream state","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: stream: fully roll back denied add-stream state\n\nWhen ADD_OUT_STREAMS is denied, SCTP only shrinks the queued chunks and\nthen lowers outcnt. That leaves removed stream metadata behind, so a\nlater re-add can reuse a stale ext and hit a null-pointer dereference in\nthe scheduler get path.\n\nFix the rollback by tearing down the removed stream state the same way\nother stream resizes do. Unschedule the current scheduler state, drop\nthe removed stream ext state with sctp_stream_outq_migrate(), and then\nreschedule the remaining streams.\n\nThis keeps scheduler-private RR/FC/PRIO lists consistent while fully\nrolling back denied outgoing stream additions.","state":0,"publishedAt":"2026-06-24T07:14:22.02+00:00","modifiedAt":"2026-10-19T19:47:07.98+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/stream.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"a6724b7b812ac8793514a1d5938db5d9d29ae725\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"9662eb0401518f0b4681f10e7fbf688f504f24cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"7dd9a42b044aad2dbe037db1c1e2943582485b44\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"39dc2b0eb5371a669ebc9ec6072b9184eac95418\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"d5ea0b3e261fcb2cfff142675516165244cab1da\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"1c6773b8c081509dcd5cd2954f2b02c50c00f151\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"637784ade221a3c8a7ecd0f583eddd95d6276b9a\",\n                            \"lessThan\": \"a5f8a90ac9f77c678a9781c0a464b635e0d63e49\",\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/stream.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.15\",\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\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85","https://git.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725","https://git.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cf","https://git.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44","https://git.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418","https://git.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1da","https://git.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151","https://git.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52929","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52929","identifiers":["CVE-2026-52929"]},"retained":false,"historicalAffected":[]}],"coverage":[]}