wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task

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Summary

CVECVE-2026-46180
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:33 UTC
Updated2026-05-28 13:44:01 UTC
DescriptionIn 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().

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.050080000 (date 2026-06-02)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a9ffda88be7416b8336f644806c2b3ed3ce08b26 ed4168d1a50fef5be8eca947fbbf05a28507d265 git Not specified
CNA Linux Linux affected a9ffda88be7416b8336f644806c2b3ed3ce08b26 d16827cb1d3936f7627d0da6044483f743ebde03 git Not specified
CNA Linux Linux affected a9ffda88be7416b8336f644806c2b3ed3ce08b26 658d2e46c2e9a8eb9b80c5e803ce3c89885b3366 git Not specified
CNA Linux Linux affected a9ffda88be7416b8336f644806c2b3ed3ce08b26 908b92231e1ded53e43fcfad5e0704d83e1b803c git Not specified
CNA Linux Linux affected a9ffda88be7416b8336f644806c2b3ed3ce08b26 c623b63580880cc742255eaed3d79804c1b91143 git Not specified
CNA Linux Linux affected 3.3 Not specified
CNA Linux Linux unaffected 3.3 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed4168d1a50fef5be8eca947fbbf05a28507d265 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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