CVE-2026-53328

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

Description An issue exists in the Linux kernel where a warning is triggered in the scx cgroup move task() function when a sched ext scheduler is loaded. This occurs when the systemd user manager writes to its own subtree control. The warning is caused by a mismatch where scx cgroup can attach() relies on cgroup identity, while migration is driven by css identity. This can result in the cgrp moving from variable being NULL during a legitimate css-only migration, leading to an unnecessary WARN event.

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