---
id: CVE-2026-98000
title: |-
  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
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 …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3ad2a7b9b15d5072139a20be84adb36776eb6c9b <
    8afab57bcdbc2186f325972e777880ac5a220f4f
  - >-
    Linux >= 3ad2a7b9b15d5072139a20be84adb36776eb6c9b <
    01dd8b4fc2cf83c66565c0f382fb1841e9000a89
  - >-
    Linux >= 3ad2a7b9b15d5072139a20be84adb36776eb6c9b <
    354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2
  - Linux 6.18
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:28.213'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98000'
references:
  - url: 'https://git.kernel.org/stable/c/01dd8b4fc2cf83c66565c0f382fb1841e9000a89'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8afab57bcdbc2186f325972e777880ac5a220f4f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.862Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.