nfsd: Initialize ssc before laundromat_work to prevent NULL dereference
In the Linux kernel, the following vulnerability has been resolved: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.
CVE-2025-38231
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-2025-38231
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": "a4bc287943f5695209ff36bdc89f17b48d68fae7",
"lessThan": "deaeb74ae9318252829c59a84a7d2316fc335660",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "0fccf5f01ed28725cc313a66ca1247eef911d55e",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "a97668ec6d73dab237cd1c15efe012a10090a4ed",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "5060e1a5fef184bd11d298e3f0ee920d96a23236",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64",
"versionType": "git"
},
{
"status": "affected",
"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
"lessThan": "b31da62889e6d610114d81dc7a6edbcaa503fcf8",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.220",
"lessThan": "5.10.239",
"versionType": "semver"
}
],
"programFiles": [
"fs/nfsd/nfssvc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.239",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.186",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.95",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.35",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.4",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfsd/nfssvc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38231
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27025 · Revision 1
- Added to Heist Feed
- Publisher date