nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()
In the Linux kernel, the following vulnerability has been resolved: nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid() The pynfs DELEG8 test fails when run against nfsd. It acquires a delegation and then lets the lease time out. It then tries to use the deleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets bad NFS4ERR_BAD_STATEID instead. When a delegation is revoked, it's initially marked with SC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it's marked with the SC_STATUS_FREEABLE flag, which denotes that it is waiting for s FREE_STATEID call. nfs4_lookup_stateid() accepts a statusmask that includes the status flags that a found stateid is allowed to have. Currently, that mask never includes SC_STATUS_FREEABLE, which means that revoked delegations are (almost) never found. Add SC_STATUS_FREEABLE to the always-allowed status flags, and remove it from nfsd4_delegreturn() since it's now always implied.
CVE-2025-39688
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-2025-39688
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": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
"lessThan": "52e209203c35a4fbff8af23cd3613efe5df40102",
"versionType": "git"
},
{
"status": "affected",
"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
"lessThan": "dc6f3295905d7185e71091870119a8c11c3808cc",
"versionType": "git"
},
{
"status": "affected",
"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
"lessThan": "5bcb44e650bc4ec7eac23df90c5e011a77fa2beb",
"versionType": "git"
},
{
"status": "affected",
"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
"lessThan": "d1bc15b147d35b4cb7ca99a9a7d79d41ca342c13",
"versionType": "git"
},
{
"status": "affected",
"version": "967faa26f313a62e7bebc55d5b8122eaee43b929",
"versionType": "git"
},
{
"status": "affected",
"version": "6.11.6",
"lessThan": "6.12",
"versionType": "semver"
}
],
"programFiles": [
"fs/nfsd/nfs4state.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.23",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.11",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14.2",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfsd/nfs4state.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39688
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30618 · Revision 1
- Added to Heist Feed
- Publisher date