AZL-58887
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-58887.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-58887
- Upstream
- Published
- 2025-02-27T03:15:19Z
- Modified
- 2026-04-21T04:37:09.674767Z
- Summary
- CVE-2025-21786 affecting package kernel 5.15.200.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
workqueue: Put the pwq after detaching the rescuer from the pool
The commit 68f83057b913("workqueue: Reap workers via kthreadstop() and remove detachcompletion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in putunboundpool(), which caused a use-after-free bug reported by Cheung Wall.
To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.
- References