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CVE-2026-80804

Status: ReceivedUnscored—

In the Linux kernel, the following vulnerability has been resolved:

xfs: restore nofs context unconditionally in xfs_trans_roll

When __xfs_trans_commit() fails in xfs_trans_roll(), the NOFS context is cleared but only restored in the success path. This leaves the error path without nofs protection, causing a circular lock dependency between xfs_nondir_ilock_class and fs_reclaim:

Fix this by moving xfs_trans_set_context() before the error check so that nofs context is always restored on the new transaction.

Technical details traces, logs and code from the original report
       CPU0                    CPU1
       ----                    ----
  lock(&xfs_nondir_ilock_class);
                               lock(fs_reclaim);
                               lock(&xfs_nondir_ilock_class);
  lock(fs_reclaim);

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-80804",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "a1ca658d649a4d8972e2e21ac2625b633217e327",
              "lessThan": "b09198cf90ccf296970b774beea1c1ddb260f94c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a1ca658d649a4d8972e2e21ac2625b633217e327",
              "lessThan": "4d00a39c676274f4071b467e630565ac1e3ae0f2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a1ca658d649a4d8972e2e21ac2625b633217e327",
              "lessThan": "0241ea5fb0fe86d2a673163b2f5815111aadc7f7",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/xfs/xfs_trans.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "7.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/xfs/xfs_trans.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T16:18:07.397",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0241ea5fb0fe86d2a673163b2f5815111aadc7f7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4d00a39c676274f4071b467e630565ac1e3ae0f2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b09198cf90ccf296970b774beea1c1ddb260f94c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: restore nofs context unconditionally in xfs_trans_roll\n\nWhen __xfs_trans_commit() fails in xfs_trans_roll(), the NOFS context\nis cleared but only restored in the success path.  This leaves the\nerror path without nofs protection, causing a circular lock dependency\nbetween xfs_nondir_ilock_class and fs_reclaim:\n\n       CPU0                    CPU1\n       ----                    ----\n  lock(&xfs_nondir_ilock_class);\n                               lock(fs_reclaim);\n                               lock(&xfs_nondir_ilock_class);\n  lock(fs_reclaim);\n\nFix this by moving xfs_trans_set_context() before the error check so\nthat nofs context is always restored on the new transaction."
    }
  ],
  "lastModified": "2026-09-04T16:18:07.397",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}