UBUNTU-CVE-2025-21771

In the Linux kernel, the following vulnerability has been resolved: schedext: Fix incorrect autogroup migration detection scxmovetask is called from schedmovetask and tells the BPF scheduler that cgroup migration is being committed. schedmovetask is used by both cgroup and autogroup migrations an...

CVE-2025-21771

CVE-2025-21771 affects the Linux kernel sched_ext subsystem. It stems from incorrect autogroup migration detection in the cgroup/migration path where scx_move_task() could misclassify a non-root cgroup migration as autogroup root migration, triggering a warning. The fix changes the call path by a...