CVE-2025-21786 - Linux Kernel Workqueue Use-After-Free Vulnerability

CVE-2025-21786 - Linux Kernel Workqueue Use-After-Free Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Thu, 02/27/2025 - 06:47
CVE ID : CVE-2025-21786
Published : Feb. 27, 2025, 3:15 a.m. | 1 hour, 33 minutes ago
Description : 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 kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), 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.
Severity: 0.0 | NA
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