CVE-2026-98000

Summary

In 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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3ad2a7b9b15d5072139a20be84adb36776eb6c9b < 8afab57bcdbc2186f325972e777880ac5a220f4faffected
LinuxLinux3ad2a7b9b15d5072139a20be84adb36776eb6c9b < 01dd8b4fc2cf83c66565c0f382fb1841e9000a89affected
LinuxLinux3ad2a7b9b15d5072139a20be84adb36776eb6c9b < 354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References