CVE-2026-98231
- Source
- https://cve.org/CVERecord?id=CVE-2026-98231
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98231.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98231
- Downstream
- Published
- 2026-10-06T08:45:05Z
- Modified
- 2026-10-08T02:52:53Z
- Summary
- xfrm: serialize state GC with device state flush
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
xfrm: serialize state GC with device state flush
The deferred-device pass in xfrm_dev_state_flush() finds states under xfrm_state_dev_gc_lock, but drops the lock before calling xfrm_dev_state_free() because the driver callback may sleep. The device GC list does not hold an xfrm_state reference, so the state GC worker can destroy the same state concurrently.
The race can proceed as follows:
CPU 0 CPU 1 find x on the device GC list drop xfrm_state_dev_gc_lock read x->xso.dev xfrm_state_gc_destroy(x) xfrm_dev_state_free(x) xfrm_state_free(x) continue xfrm_dev_state_free(x)
Both paths can invoke the driver callback and drop the device reference. CPU 0 can also access the xfrm_state after CPU 1 has freed it.
KASAN reported:
BUG: KASAN: slab-use-after-free in xfrm_dev_state_free+0x24c/0x2a0 Read of size 8 at addr ffff88810bbaa960 by task poc/102
Call Trace: xfrm_dev_state_free+0x24c/0x2a0 xfrm_dev_state_flush+0x353/0x400 xfrm_dev_event+0x26d/0x3a0 notifier_call_chain+0xc0/0x280 __dev_notify_flags+0x169/0x250 netif_change_flags+0xe7/0x160 dev_change_flags+0x96/0x220 devinet_ioctl+0x7f4/0x1880
Allocated by task 87: xfrm_state_alloc+0x1e/0x5c0 xfrm_add_sa+0xe7f/0x5820 xfrm_user_rcv_msg+0x4f3/0x940
Freed by task 57: kmem_cache_free+0xcb/0x3d0 xfrm_state_gc_task+0x4a8/0x650 process_one_work+0x63a/0x1070
Serialize xfrm_state destruction against the deferred-device pass with a mutex. Keep xfrm_state_dev_gc_lock limited to list operations and retain the existing callback and device-reference release ordering.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98231.json" }- References
-
- https://git.kernel.org/stable/c/39e41af3653ee45c985190dd97426f318918d201
- https://git.kernel.org/stable/c/75fc4561772e2f9811abf39ed10443e6f4a4bc6c
- https://git.kernel.org/stable/c/84e378395494963b1e581cf223a7cbeec8c0e2d6
- https://git.kernel.org/stable/c/89fefad9f971bc637fb22373078144f2563c4be9
- https://git.kernel.org/stable/c/937108dc0258d6ac69926b00bc53598c98986ee1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98231.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98231
- 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
-
Introducedd5f53edd43daf3e6e1633a49c561387f8f99e13fFixed937108dc0258d6ac69926b00bc53598c98986ee1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced07b87f9eea0c30675084d50c82532d20168da009Fixed39e41af3653ee45c985190dd97426f318918d201Fixed75fc4561772e2f9811abf39ed10443e6f4a4bc6cFixed84e378395494963b1e581cf223a7cbeec8c0e2d6Fixed89fefad9f971bc637fb22373078144f2563c4be9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.44Fixed6.6.158
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.10.3Fixed6.11
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8ecee44464a4926c9bef989a1490b7394785f584
Affected versions
v6.*
Linux / Kernel
Package
- Name
- Kernel