CVE-2026-46180
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task Watchdog task might end between send_sig() and kthread_stop() calls, what results in the use-after-free issue. Fix this by increasing watchdog task reference count before calling send_sig() and dropping it by switching to kthread_stop_put().
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366Patch
- https://git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803cPatch
- https://git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143Patch
- https://git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03Patch
- https://git.kernel.org/stable/c/ed4168d1a50fef5be8eca947fbbf05a28507d265Patch
- https://git.kernel.org/stable/c/a21f735fb1017ef89c6f9dbf4d799513b4e7bd5a
- https://git.kernel.org/stable/c/d616bb10de79e5c2bd8a24230a1128aeaf715615
- https://git.kernel.org/stable/c/df2e90d6a9955510f24f1dada78cfc439fd9fa88