nfsd: validate nseconds in TIME_DELEG decode paths
In the Linux kernel, the following vulnerability has been resolved: nfsd: validate nseconds in TIME_DELEG decode paths The xdrgen-based TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode arms store a raw uint32_t nseconds directly into tv_nsec without enforcing nseconds < NSEC_PER_SEC. The legacy nfsd4_decode_nfstime4 has this check but the TIME_DELEG paths do not. A malformed timespec can propagate through notify_change() to disk. Add range checks in both nfs4xdr.c (SETATTR path) and nfs4callback.c (CB_GETATTR path).
CVE-2026-89701
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-2026-89701
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": "6ae30d6eb26bce02c48c60074b4306270e2434c1",
"lessThan": "7e7b93da7fa2e77f977096251899d1410986adf6",
"versionType": "git"
},
{
"status": "affected",
"version": "6ae30d6eb26bce02c48c60074b4306270e2434c1",
"lessThan": "5eb489831a9fd4754f4baf26e6989efb66ce104c",
"versionType": "git"
},
{
"status": "affected",
"version": "6ae30d6eb26bce02c48c60074b4306270e2434c1",
"lessThan": "0f4a767340fad392bd656115b8752005518c9065",
"versionType": "git"
}
],
"programFiles": [
"fs/nfsd/nfs4callback.c",
"fs/nfsd/nfs4xdr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfsd/nfs4callback.c",
"fs/nfsd/nfs4xdr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89701
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35185 · Revision 1
- Added to Heist Feed
- Publisher date