nfsd: check client ownership when cancelling a copy-notify stateid
In the Linux kernel, the following vulnerability has been resolved: nfsd: check client ownership when cancelling a copy-notify stateid On the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the target cpntf state without checking ownership. The lookup key st->si_opaque.so_id is allocated cyclically (guessable) and the embedded clientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated NFSv4.2 client could cancel and free another client's copy-notify stateid. Compare the creating clientid recorded in state->cp_p_clid against the requesting client's cl_clientid and return nfserr_bad_stateid on a mismatch instead of freeing the entry.
CVE-2026-89694
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-2026-89694
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": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "81b2cfe767943922eca906a2a5af23a0ce5d0f35",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "6bba72b8ee68ad631b94bd439592cba46de54d7d",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "75268f6cfe26b09a7e4d3216367e87fe9e2a26aa",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "b1eca07303594ca27f5dc360a6946bd7e1f5b04c",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "b42dc26a14b4ad5d6daaada11ec4c70744141c25",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "d801906165cb5cc250d5cbe44935594e170be3e2",
"versionType": "git"
},
{
"status": "affected",
"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
"lessThan": "6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf",
"versionType": "git"
}
],
"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": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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/nfs4state.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89694
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35178 · Revision 1
- Added to Heist Feed
- Publisher date