hwmon: Fix potential UAF in pec_store

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Summary

CVECVE-2026-98000
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:28 UTC
Updated2026-09-25 11:17:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: Fix potential UAF in pec_store Sashiko reports: In pec_store(), a guard(mutex)(&hwdev->lock) is taken. If the chip write operation returns an error other than -EOPNOTSUPP, the code jumps to the put label, which calls put_device(hdev). If this drops the final reference, the device is freed. When the function then returns, the guard cleanup function runs and attempts to unlock the freed mutex. Use scoped_guard() instead of guard() to avoid the problem.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.051890000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3ad2a7b9b15d5072139a20be84adb36776eb6c9b 8afab57bcdbc2186f325972e777880ac5a220f4f git Not specified
CNA Linux Linux affected 3ad2a7b9b15d5072139a20be84adb36776eb6c9b 01dd8b4fc2cf83c66565c0f382fb1841e9000a89 git Not specified
CNA Linux Linux affected 3ad2a7b9b15d5072139a20be84adb36776eb6c9b 354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8afab57bcdbc2186f325972e777880ac5a220f4f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/01dd8b4fc2cf83c66565c0f382fb1841e9000a89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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