nfsd: initialize DRC hash table before registering shrinker
In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize DRC hash table before registering shrinker shrinker_register() precedes the INIT_LIST_HEAD loop and the drc_hashsize store. On weakly-ordered architectures (arm64, ppc), a shrinker scan can observe drc_hashsize before the bucket list heads are initialized, causing a NULL deref in the DRC shrinker callback. Move bucket initialization and the drc_hashsize store before shrinker_register() so the hash table is fully initialized before it becomes visible to the shrinker.
CVE-2026-93211
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-2026-93211
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": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
"lessThan": "f060f43a67635dbb393bf5dcbfc3e8b9a44942cb",
"versionType": "git"
},
{
"status": "affected",
"version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
"lessThan": "b57bd8cb739cb3cf88bdb1a5903a42a707a5c282",
"versionType": "git"
},
{
"status": "affected",
"version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
"lessThan": "431c70ca5163c98c746f22f16cd58ca5aefec6dc",
"versionType": "git"
},
{
"status": "affected",
"version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
"lessThan": "b0c58934f5cc4f05b63ef6605dd10c1d0d489e88",
"versionType": "git"
}
],
"programFiles": [
"fs/nfsd/nfscache.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.7",
"versionType": "semver"
},
{
"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/nfscache.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93211
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37914 · Revision 1
- Added to Heist Feed
- Publisher date