Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: protect critical_task_priority updates with s_umount The sysfs store path already takes s_umount for GC thread control entries, and ckpt_thread_ioprio is covered as well. critical_task_priority also updates checkpoint or GC kthread scheduling state, but it is not covered by that serialization. It can race with remount or teardown paths that are stopping those threads. Protect critical_task_priority sysfs writes with s_umount too.
References
- https://git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33
- https://git.kernel.org/stable/c/bee6dfcc111b1dffdb3e13d73b7028b699fa0165
FAQ
What is CVE-2026-89831?
CVE-2026-89831 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: f2fs: protect critical_task_priority updates with s_umount The sysfs store path already takes s_umount for GC thread control entri...
How severe is CVE-2026-89831?
CVSS scoring is not yet available for CVE-2026-89831. Check NVD for updates.
Is there a patch for CVE-2026-89831?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.