{"id":"CVE-2026-98230","title":"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 b…","summary":"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 b…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= aa48a18fdb0911572d133057cd579db704b87da4 < fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","Linux >= 0045e3d80613cc7174dc15f189ee6fc4e73b9365 < 4748c27e2e6a1969e02f1df46e62f79d2799b80b","Linux >= 0045e3d80613cc7174dc15f189ee6fc4e73b9365 < 9b74a47a4cbd0d29faff4f3b199212c73e6b6220","Linux >= 0045e3d80613cc7174dc15f189ee6fc4e73b9365 < 2afb8dc1f4390f164db8352f8e685e126e9db566","Linux 5e4334dc39443645415450163ff5ff1ee7e79784","Linux >= 6.12.13 < 6.12.112","Linux 6.13"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:10.397","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98230","references":[{"url":"https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.437Z","slug":"CVE-2026-98230","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}