Description
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().
Affected products
linux: linux kernel
References9
- git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366 Patch
- git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803c Patch
- git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143 Patch
- git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03 Patch
- git.kernel.org/stable/c/ed4168d1a50fef5be8eca947fbbf05a28507d265 Patch
- git.kernel.org/stable/c/a21f735fb1017ef89c6f9dbf4d799513b4e7bd5a
- git.kernel.org/stable/c/d616bb10de79e5c2bd8a24230a1128aeaf715615
- git.kernel.org/stable/c/df2e90d6a9955510f24f1dada78cfc439fd9fa88
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 15 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.