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