CVE-2026-74593

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

Description A deadlock can occur in the sched ext component when scx cgroup lock() acquires a write-lock on scx cgroup ops rwsem before taking the cgroup lock(). This sequence creates a circular dependency involving kernfs during operations such as cgroup removal (rmdir) and writing to cpu.weight. Specifically, the enable path waits for the cgroup mutex, while the removal process waits in kernfs drain() for an active reference, and the write operation in scx group set weight() waits for the rwsem held by a pending writer.

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