Not yet scoredPublished Aug 10, 2026

CVE-2026-68357watchdog: pretimeout: Fix UAF in watchdog_unregister_governor()

Updated under an hour ago (Oct 27, 2026, 8:30 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: watchdog: pretimeout: Fix UAF in watchdog_unregister_governor() When a watchdog governor is unregistered, it updates existing watchdog devices that were using this governor by falling back to `default_gov`. If the governor being unregistered is currently set as `default_gov`, the `default_gov` is never cleared. This leads to 2 use-after-free issues: 1. New watchdog devices registered after this point will inherit the dangling `default_gov`. 2. Existing watchdog devices using the unregistered governor will have their `wdd->gov` reassigned to the dangling `default_gov`. Fix the UAF by clearing `default_gov` if it matches the governor being unregistered.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from da0d12ff2b829a35e9921918e925d79497b82bef before b9ae33faa96bdec6bc60e4c5f8f53786182e4207; from da0d12ff2b829a35e9921918e925d79497b82bef before 472ec1e34ff0bb26379805cae808f658cce58c35; from da0d12ff2b829a35e9921918e925d79497b82bef before 7a2ee3ec6f208307eca1119a343c7b5d39c03708; from da0d12ff2b829a35e9921918e925d79497b82bef before 2e47b91b9b4020fcc01def14d6b6556d66074cf4; from da0d12ff2b829a35e9921918e925d79497b82bef before 0ca252720f0e38411cfec3431db9bb1aed0a412c; from da0d12ff2b829a35e9921918e925d79497b82bef before 7d1658b066de30f4b23afc14814d22416a971e6e; from da0d12ff2b829a35e9921918e925d79497b82bef before 7993d626983cc58fbde9607333cfd2d57725c197; from da0d12ff2b829a35e9921918e925d79497b82bef before 7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661	CNA record

References

References

https://git.kernel.org/stable/c/b9ae33faa96bdec6bc60e4c5f8f53786182e4207
https://git.kernel.org/stable/c/472ec1e34ff0bb26379805cae808f658cce58c35
https://git.kernel.org/stable/c/7a2ee3ec6f208307eca1119a343c7b5d39c03708
https://git.kernel.org/stable/c/2e47b91b9b4020fcc01def14d6b6556d66074cf4
https://git.kernel.org/stable/c/0ca252720f0e38411cfec3431db9bb1aed0a412c
https://git.kernel.org/stable/c/7d1658b066de30f4b23afc14814d22416a971e6e
https://git.kernel.org/stable/c/7993d626983cc58fbde9607333cfd2d57725c197
https://git.kernel.org/stable/c/7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.