CVE-2026-89831 (GCVE-0-2026-89831)
Vulnerability from cvelistv5
Published
2026-09-16 10:31
Modified
2026-10-19 08:53
Severity ?
Summary
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
Impacted products
Vendor Product Version
Linux Linux Version: 52190933c37a96164b271f3f30c16099d9eb8c09
Version: 52190933c37a96164b271f3f30c16099d9eb8c09
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          "programFiles": [
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:53:24.792Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33"
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    "cveId": "CVE-2026-89831",
    "datePublished": "2026-09-16T10:31:03.702Z",
    "dateReserved": "2026-09-11T19:38:34.769Z",
    "dateUpdated": "2026-10-19T08:53:24.792Z",
    "state": "PUBLISHED"
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