CVE-2026-74329
watchdog: unregister PM notifier on watchdog unregister
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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_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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.15
References 7
git.kernel.org
- stable/c/cd2d1b1f99308f7680d75a377daaff363f1cc736
- stable/c/5d9b58ec6f5de5e159a570d419b1b08b3b9f854b
- stable/c/89184909634e50d086d86d8a0c03fc86fe8d889f
- stable/c/e690afea5c876a4abfa2978c6a664460ed7d1217
- stable/c/298821692d447c2f7b1bc9ef41cd88a31bf56436
- stable/c/c70b5bb6f04f77ef90e047d7edc2f476e206909f
- stable/c/a298c7302ee9584a7a1ac1e8acbede8d98ab51a4