Vulnerability-Lookup

GHSA-GH89-F7G4-6QGP

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89831"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:16:49Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-gh89-f7g4-6qgp",
  "modified": "2026-09-16T12:30:38Z",
  "published": "2026-09-16T12:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89831"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bee6dfcc111b1dffdb3e13d73b7028b699fa0165"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89831 (GCVE-0-2026-89831)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31

Title

f2fs: protect critical_task_priority updates with s_umount

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/bee6dfcc111b1dffd…
https://git.kernel.org/stable/c/8e4692c6c165e81b2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 52190933c37a96164b271f3f30c16099d9eb8c09 , < bee6dfcc111b1dffdb3e13d73b7028b699fa0165 (git) Affected: 52190933c37a96164b271f3f30c16099d9eb8c09 , < 8e4692c6c165e81b2cbb847d8da4b45a53483b33 (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bee6dfcc111b1dffdb3e13d73b7028b699fa0165",
              "status": "affected",
              "version": "52190933c37a96164b271f3f30c16099d9eb8c09",
              "versionType": "git"
            },
            {
              "lessThan": "8e4692c6c165e81b2cbb847d8da4b45a53483b33",
              "status": "affected",
              "version": "52190933c37a96164b271f3f30c16099d9eb8c09",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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": "2026-09-16T10:31:03.702Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bee6dfcc111b1dffdb3e13d73b7028b699fa0165"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e4692c6c165e81b2cbb847d8da4b45a53483b33"
        }
      ],
      "title": "f2fs: protect critical_task_priority updates with s_umount",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89831",
    "datePublished": "2026-09-16T10:31:03.702Z",
    "dateReserved": "2026-09-11T19:38:34.769Z",
    "dateUpdated": "2026-09-16T10:31:03.702Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-GH89-F7G4-6QGP

CVE-2026-89831 (GCVE-0-2026-89831)

Tags

Sightings

Nomenclature

Related by attack behaviour