{"id":"CVE-2026-89831","published":"2026-09-16T11:16:49.870","lastModified":"2026-09-16T11:16:49.870","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: protect critical_task_priority updates with s_umount\n\nThe sysfs store path already takes s_umount for GC thread control\nentries, and ckpt_thread_ioprio is covered as well.\n\ncritical_task_priority also updates checkpoint or GC kthread scheduling\nstate, but it is not covered by that serialization. It can race with\nremount or teardown paths that are stopping those threads.\n\nProtect critical_task_priority sysfs writes with s_umount too.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33","tags":[]},{"url":"https://git.kernel.org/stable/c/bee6dfcc111b1dffdb3e13d73b7028b699fa0165","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}