CVE-2025-68823

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

Description A deadlock situation can occur when a process, such as udev, opens a ublk block device to read the partition table. This happens because of a circular dependency involving mutex locks. Specifically, the process acquires a disk mutex, issues a read I/O request, and then a callback function may trigger a file descriptor release, which attempts to reacquire the same mutex, leading to a deadlock. The issue is resolved by ensuring that certain request handling functions run with bottom halves disabled, forcing the release operation to occur in a different context and preventing the deadlock.

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