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CVE-2026-89831 f2fs: protect critical_task_priority updates with s_umount

🗓️ 16 Sep 2026 10:31:03Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 4 Views

f2fs critical_task_priority sysfs writes race with remount/teardown due to missing s_umount lock.

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