CVE-2026-98230
- Source
- https://cve.org/CVERecord?id=CVE-2026-98230
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98230.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98230
- Downstream
- Published
- 2026-10-06T08:45:04Z
- Modified
- 2026-10-09T02:30:48Z
- Severity
-
- 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 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:
xfrm: use hlist_del_init_rcu for state_cache and state_cache_input
Commit 14acf9652e56 ("xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete") converted bydst/bysrc/byseq/byspi from hlist_del_rcu() to hlist_del_init_rcu() so that a second __xfrm_state_delete() on the same object becomes a no-op rather than a write through LIST_POISON pprev. It missed state_cache and state_cache_input, which kept hlist_del_rcu():
- hlist_del_rcu() leaves pprev = LIST_POISON2 (non-NULL), so hlist_unhashed() returns false.
- hlist_del_init_rcu() leaves pprev = NULL, so hlist_unhashed() returns true.
A second __xfrm_state_delete() therefore enters __hlist_del() on the already-deleted state_cache/state_cache_input nodes and does WRITE_ONCE(*pprev, next) through LIST_POISON2 — a write use-after-free once the slab is reused. The corruption can in turn cause a subsequent hlist_for_each_entry_rcu traversal to follow a dangling next pointer, producing the read use-after-free reported in xfrm_input_state_lookup().
Switch state_cache and state_cache_input to hlist_del_init_rcu() to match the other four lists, closing the write use-after-free and, with it, the read use-after-free it spawns.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98230.json" }- References
-
- https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566
- https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b
- https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220
- https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98230.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98230
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedaa48a18fdb0911572d133057cd579db704b87da4Fixedfb38fb7420d5f7192f9e2b6ac835ede149cd7ac5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0045e3d80613cc7174dc15f189ee6fc4e73b9365Fixed4748c27e2e6a1969e02f1df46e62f79d2799b80bFixed9b74a47a4cbd0d29faff4f3b199212c73e6b6220Fixed2afb8dc1f4390f164db8352f8e685e126e9db566
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.13Fixed6.12.112
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e4334dc39443645415450163ff5ff1ee7e79784