---
id: CVE-2026-74329
title: 'watchdog: unregister PM notifier on watchdog unregister'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  watchdog: unregister PM notifier on watchdog unregister

  watchdog_register_device() registers wdd->pm_nb when
  WDOG_NO_PING_ON_SUSPEND is set, but watchdog_unregister_de…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    cd2d1b1f99308f7680d75a377daaff363f1cc736
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    5d9b58ec6f5de5e159a570d419b1b08b3b9f854b
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    89184909634e50d086d86d8a0c03fc86fe8d889f
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    e690afea5c876a4abfa2978c6a664460ed7d1217
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    298821692d447c2f7b1bc9ef41cd88a31bf56436
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    c70b5bb6f04f77ef90e047d7edc2f476e206909f
  - >-
    Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 <
    a298c7302ee9584a7a1ac1e8acbede8d98ab51a4
  - Linux 5.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:56:09.716497Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:44.044Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74329'
references:
  - url: 'https://git.kernel.org/stable/c/cd2d1b1f99308f7680d75a377daaff363f1cc736'
  - url: 'https://git.kernel.org/stable/c/5d9b58ec6f5de5e159a570d419b1b08b3b9f854b'
  - url: 'https://git.kernel.org/stable/c/89184909634e50d086d86d8a0c03fc86fe8d889f'
  - url: 'https://git.kernel.org/stable/c/e690afea5c876a4abfa2978c6a664460ed7d1217'
  - url: 'https://git.kernel.org/stable/c/298821692d447c2f7b1bc9ef41cd88a31bf56436'
  - url: 'https://git.kernel.org/stable/c/c70b5bb6f04f77ef90e047d7edc2f476e206909f'
  - url: 'https://git.kernel.org/stable/c/a298c7302ee9584a7a1ac1e8acbede8d98ab51a4'
tags:
  - cve.org
epss: 0.00215
epssPercentile: 0.11893
ingestedAt: '2026-11-06T18:00:12.570Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

watchdog: unregister PM notifier on watchdog unregister

watchdog_register_device() registers wdd->pm_nb when
WDOG_NO_PING_ON_SUSPEND is set, but watchdog_unregister_device() does not
remove it. This leaves an embedded notifier block on the PM notifier chain
after the watchdog device has been unregistered.

A later suspend/resume notification can then call watchdog_pm_notifier()
with a stale watchdog_device pointer, or at minimum after wdd->wd_data has
been cleared by watchdog_dev_unregister().

Unregister the PM notifier before tearing down the watchdog device.

## Affected

- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < cd2d1b1f99308f7680d75a377daaff363f1cc736`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < 5d9b58ec6f5de5e159a570d419b1b08b3b9f854b`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < 89184909634e50d086d86d8a0c03fc86fe8d889f`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < e690afea5c876a4abfa2978c6a664460ed7d1217`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < 298821692d447c2f7b1bc9ef41cd88a31bf56436`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < c70b5bb6f04f77ef90e047d7edc2f476e206909f`
- `Linux >= 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 < a298c7302ee9584a7a1ac1e8acbede8d98ab51a4`
- `Linux 5.15`

## Remediation

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