CVE - CVE-2025-21786

CVE-ID
CVE-2025-21786	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/835b69c868f53f959d4986bbecd561ba6f38e492 URL:https://git.kernel.org/stable/c/835b69c868f53f959d4986bbecd561ba6f38e492 MISC:https://git.kernel.org/stable/c/e76946110137703c16423baf6ee177b751a34b7e URL:https://git.kernel.org/stable/c/e76946110137703c16423baf6ee177b751a34b7e MISC:https://git.kernel.org/stable/c/e7c16028a424dd35be1064a68fa318be4359310f URL:https://git.kernel.org/stable/c/e7c16028a424dd35be1064a68fa318be4359310f
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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