{"schema":"threatline.record/2","record":{"id":"CVE-2026-98230","aliases":[],"summary":"xfrm: use hlist_del_init_rcu for state_cache and state_cache_input","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: use hlist_del_init_rcu for state_cache and state_cache_input\n\nCommit 14acf9652e56 (\"xfrm: defensively unhash xfrm_state lists in\n__xfrm_state_delete\") converted bydst/bysrc/byseq/byspi from\nhlist_del_rcu() to hlist_del_init_rcu() so that a second\n__xfrm_state_delete() on the same object becomes a no-op rather than a\nwrite through LIST_POISON pprev. It missed state_cache and\nstate_cache_input, which kept hlist_del_rcu():\n\n- hlist_del_rcu() leaves pprev = LIST_POISON2 (non-NULL), so\n  hlist_unhashed() returns false.\n- hlist_del_init_rcu() leaves pprev = NULL, so hlist_unhashed()\n  returns true.\n\nA second __xfrm_state_delete() therefore enters __hlist_del() on the\nalready-deleted state_cache/state_cache_input nodes and does\nWRITE_ONCE(*pprev, next) through LIST_POISON2 — a write use-after-free\nonce the slab is reused. The corruption can in turn cause a subsequent\nhlist_for_each_entry_rcu traversal to follow a dangling next pointer,\nproducing the read use-after-free reported in xfrm_input_state_lookup().\n\nSwitch state_cache and state_cache_input to hlist_del_init_rcu() to\nmatch the other four lists, closing the write use-after-free and, with\nit, the read use-after-free it spawns.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"aa48a18fdb0911572d133057cd579db704b87da4","lessThan":"fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","status":"affected","versionType":"git"},{"version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","lessThan":"4748c27e2e6a1969e02f1df46e62f79d2799b80b","status":"affected","versionType":"git"},{"version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","lessThan":"9b74a47a4cbd0d29faff4f3b199212c73e6b6220","status":"affected","versionType":"git"},{"version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","lessThan":"2afb8dc1f4390f164db8352f8e685e126e9db566","status":"affected","versionType":"git"},{"version":"5e4334dc39443645415450163ff5ff1ee7e79784","status":"affected","versionType":"git"},{"version":"6.12.13","lessThan":"6.12.112","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.13","status":"affected"},{"version":"0","lessThan":"6.13","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","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-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4748c27e2e6a1969e02f1df46e62f79d2799b80b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9b74a47a4cbd0d29faff4f3b199212c73e6b6220","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2afb8dc1f4390f164db8352f8e685e126e9db566","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","source_modified_at":"2026-10-19T09:16:02.121Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.12.112","basis":"first unaffected version stated in the CVE record"}],"cvss":7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00118,"percentile":0.01621,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:45:04.548Z","modified_at":"2026-10-19T09:16:02.121Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:16:02.121Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98230","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:16:02.121Z","content_hash":"ef853cd8f2f07810a91b6ce88d5291805ac1d1098e035cf72b437408d5e097c4"}}