{"schema":"threatline.record/2","record":{"id":"CVE-2026-97940","aliases":[],"summary":"ipv6: fix fib6 walker UAF on seq stop","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix fib6 walker UAF on seq stop\n\nipv6_route_iter_active() treats a walker in FWS_U at the table root as\nalready unlinked. fib6_del_route() can move a still-linked walker into\nthat same state when the current leaf is the last route at the root,\nso ipv6_route_native_seq_stop() skips fib6_walker_unlink(). The seq\nprivate object can then be freed while it remains on\nnet->ipv6.fib6_walkers. A later route deletion walks the dangling list\nand uses the freed walker.\n\nUse the list head as membership state and reinitialize it when\nunlinking. Keep the existing w->node check so a never-started iterator\nwith a zeroed private object is not treated as linked.\n\nThe same stop helper is used by /proc/net/ipv6_route and by the BPF\nipv6_route iterator. The BPF show path only widens the race.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97940","source_modified_at":"2026-10-19T09:11:06.854Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"9a3f73d62c86271614eda4c43315230896a37018","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"63407cddabc5992b5ac03af165559f4a1968a032","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"05b687ee04f816658f4a9cf586f4d2f129157943","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"14fdaba201fdff92a3e45994e02bccda409cb19d","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"0eede1689610e9eeaf729ba86fd1321799eb91a0","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"b89b691dd00bf39b9ba39ab9446f8c62f419fa7b","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"4553cfafa8d05c4ce20b1d18f79d9bb3b303fc02","status":"affected","versionType":"git"},{"version":"8d2ca1d7b5c3e63b3a8a81ae99015b615c5f2bf7","lessThan":"19b4ed644d68098cc62ab612727f40d30f43476c","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97940","source_modified_at":"2026-10-19T09:11:06.854Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.13","status":"affected"},{"version":"0","lessThan":"3.13","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","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-2026-97940","source_modified_at":"2026-10-19T09:11:06.854Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9a3f73d62c86271614eda4c43315230896a37018","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97940","source_modified_at":"2026-10-19T09:11:06.854Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"63407cddabc5992b5ac03af165559f4a1968a032","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97940","source_modified_at":"2026-10-19T09:11:06.854Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"05b687ee04f816658f4a9cf586f4d2f129157943","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://git.kernel.org/stable/c/9a3f73d62c86271614eda4c43315230896a37018"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/63407cddabc5992b5ac03af165559f4a1968a032"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/05b687ee04f816658f4a9cf586f4d2f129157943"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/14fdaba201fdff92a3e45994e02bccda409cb19d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0eede1689610e9eeaf729ba86fd1321799eb91a0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b89b691dd00bf39b9ba39ab9446f8c62f419fa7b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4553cfafa8d05c4ce20b1d18f79d9bb3b303fc02"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/19b4ed644d68098cc62ab612727f40d30f43476c"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE 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