CVE-2025-21634 | Linux Kernel up to 6.12.9/6.13-rc6 cpuset get_online_cpus deadlock

CVE-2025-21634 | Linux Kernel up to 6.12.9/6.13-rc6 cpuset get_online_cpus deadlock

A vulnerability was found in Linux Kernel up to 6.12.9/6.13-rc6. It has been classified as critical. Affected is the function get_online_cpus of the component cpuset. The manipulation leads to deadlock. This vulnerability is traded as CVE-2025-21634. Access to the local network is required for this attack. There is no exploit available. It is recommended to upgrade the affected component.