{"api_version":"1","generated_at":"2026-10-06T22:38:07+00:00","cve":"CVE-2026-98230","urls":{"html":"https://cve.report/CVE-2026-98230","api":"https://cve.report/api/cve/CVE-2026-98230.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98230","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98230"},"summary":{"title":"xfrm: use hlist_del_init_rcu for state_cache and state_cache_input","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:10","updated_at":"2026-10-06 09:18:10"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b","name":"https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220","name":"https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566","name":"https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","name":"https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98230","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98230","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa48a18fdb0911572d133057cd579db704b87da4 fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0045e3d80613cc7174dc15f189ee6fc4e73b9365 4748c27e2e6a1969e02f1df46e62f79d2799b80b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0045e3d80613cc7174dc15f189ee6fc4e73b9365 9b74a47a4cbd0d29faff4f3b199212c73e6b6220 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0045e3d80613cc7174dc15f189ee6fc4e73b9365 2afb8dc1f4390f164db8352f8e685e126e9db566 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e4334dc39443645415450163ff5ff1ee7e79784 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.13 6.12.112 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/xfrm/xfrm_state.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5","status":"affected","version":"aa48a18fdb0911572d133057cd579db704b87da4","versionType":"git"},{"lessThan":"4748c27e2e6a1969e02f1df46e62f79d2799b80b","status":"affected","version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","versionType":"git"},{"lessThan":"9b74a47a4cbd0d29faff4f3b199212c73e6b6220","status":"affected","version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","versionType":"git"},{"lessThan":"2afb8dc1f4390f164db8352f8e685e126e9db566","status":"affected","version":"0045e3d80613cc7174dc15f189ee6fc4e73b9365","versionType":"git"},{"status":"affected","version":"5e4334dc39443645415450163ff5ff1ee7e79784","versionType":"git"},{"lessThan":"6.12.112","status":"affected","version":"6.12.13","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/xfrm/xfrm_state.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.13"},{"lessThan":"6.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"6.12.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc4","versionStartIncluding":"6.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:45:04.548Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5"},{"url":"https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b"},{"url":"https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220"},{"url":"https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566"}],"title":"xfrm: use hlist_del_init_rcu for state_cache and state_cache_input","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98230","datePublished":"2026-10-06T08:45:04.548Z","dateReserved":"2026-09-25T10:25:14.328Z","dateUpdated":"2026-10-06T08:45:04.548Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:10","lastModifiedDate":"2026-10-06 09:18:10","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98230","Ordinal":"1","Title":"xfrm: use hlist_del_init_rcu for state_cache and state_cache_inp","CVE":"CVE-2026-98230","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98230","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"xfrm: use hlist_del_init_rcu for state_cache and state_cache_inp"}]}}}