CVE-2025-21817

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A potential deadlock issue has been identified in the Linux kernel. The problem occurs when the sysfs ->store() function is called while a queue is frozen, and memory allocation with GFP KERNEL is attempted, which may lead to a direct reclaim code path and cause a deadlock. This issue is related to the block layer and involves several ->store() callbacks, including update nr requests, wbt, and scheduler.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.