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Critical

pNFS: Fix use-after-free in pnfs_update_layout()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracepoint accesses lo's fields. Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).

Announced Source revision 1
Original source ↗

CVE-2026-63800

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-63800

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "06f58dbc49a23c99e5c0f246879ed16667f7bf8f",
        "lessThan": "4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "1f24b8302c77dcaf79c64c073877a3b9f4dd25d2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "9c0fb5c09ae5bd68dc0038692af8127029cb0385",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "7e37e9b3e82ade881e1798e2f4fcc54aff7793c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "2883ddd7542b4437a2ab4908fe2773f690e20889",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "200e7637f4d6a1342987045eea72641524f909dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "9645aaf689aff57427ece3b9fa47d5b5399417f4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "13e198a90ca4050f4bee8a3f23680389a6563ccc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa2399f55eff4ec78330bb6fe55f9df53e5cae0c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.9",
        "lessThan": "5.10.260",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.4.91",
        "lessThan": "5.5",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.260",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.211",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.177",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.144",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.38",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.3",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-63800

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#40830 · Revision 1
Added to Heist Feed
Publisher date
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