{"schema":"threatline.record/2","record":{"id":"CVE-2026-99031","aliases":[],"summary":"net: bridge: avoid recursive multicast port cleanup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: avoid recursive multicast port cleanup\n\nbr_multicast_sg_del_exclude_ports() removes automatically added STAR_EXCL\nport groups by calling br_multicast_del_pg(). For S,G entries, that\ndeletion calls back into br_multicast_sg_del_exclude_ports(), so a large\nnumber of STAR_EXCL ports consumes one kernel stack frame per port and can\nhit the stack guard page.\n\nKeep the complete port-group deletion path for cleanup, but suppress the\nS,G exclude-port cleanup while that helper is already walking the same\nentry. Normal deletion callers retain the existing behavior.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"8266a0491e92d39dc9af739e8380a0daa9b8836b","lessThan":"695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64","status":"affected","versionType":"git"},{"version":"8266a0491e92d39dc9af739e8380a0daa9b8836b","lessThan":"2fb87c6025f90191516bee3ce14b42eb3e1cfed7","status":"affected","versionType":"git"},{"version":"8266a0491e92d39dc9af739e8380a0daa9b8836b","lessThan":"d109141ba14652146089ef78b32d5e4d5285ebad","status":"affected","versionType":"git"},{"version":"8266a0491e92d39dc9af739e8380a0daa9b8836b","lessThan":"7931fb9181421953f3133b408b0f2e2b8dd68b61","status":"affected","versionType":"git"},{"version":"8266a0491e92d39dc9af739e8380a0daa9b8836b","lessThan":"5158353121bae4f552cb677ce8c5c3ef52f93a0d","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.10","status":"affected"},{"version":"0","lessThan":"5.10","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"2fb87c6025f90191516bee3ce14b42eb3e1cfed7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"7931fb9181421953f3133b408b0f2e2b8dd68b61","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","source_modified_at":"2026-10-23T12:21:31.535Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"5158353121bae4f552cb677ce8c5c3ef52f93a0d","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:21:31.535Z","modified_at":"2026-10-23T12:21:31.535Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99031","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:21:31.535Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2fb87c6025f90191516bee3ce14b42eb3e1cfed7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d109141ba14652146089ef78b32d5e4d5285ebad"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7931fb9181421953f3133b408b0f2e2b8dd68b61"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5158353121bae4f552cb677ce8c5c3ef52f93a0d"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T12:21:31.535Z","content_hash":"19e700c840cdb431a2a54361703b562d8e6586a90e414a572c2073ddcc157f77"}}