f2fs: protect critical_task_priority updates with s_umount

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89831
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:16:49 UTC
Updated2026-09-16 11:16:49 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 52190933c37a96164b271f3f30c16099d9eb8c09 bee6dfcc111b1dffdb3e13d73b7028b699fa0165 git Not specified
CNA Linux Linux affected 52190933c37a96164b271f3f30c16099d9eb8c09 8e4692c6c165e81b2cbb847d8da4b45a53483b33 git Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bee6dfcc111b1dffdb3e13d73b7028b699fa0165 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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