security/keys: fix missed RCU read section on lookup
In the Linux kernel, the following vulnerability has been resolved: security/keys: fix missed RCU read section on lookup Nicholas Carlini reports that the keyring code calls assoc_array_find() in find_key_to_update() without holding the RCU read lock, while the assoc_array_gc() code really is designed around removing the node from the tree and then freeing it after an RCU grace-period. The regular key handling doesn't see this because holding the keyring semaphore hides any lifetime issues, but the persistent key handling uses a different model. Instead of extending the keyring locking, just do the simple RCU locking that the assoc_array was designed for.
CVE-2026-64015
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-2026-64015
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": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "4c5d407ba3ff7f30561ff73ba1b07ed70c864edc",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "cefa4265b11176c897a7d9e8e54d89e3701c5584",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "5659e6923cb72f8e18e8b539109ab512455fe195",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "50bb3435a5e627bfbdc52eb4536f49f88b3486b8",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "66288dcadf80974436250e9f70ed848836b835b5",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "43a1e3744548e6fd85873e6fb43e293eb4010694",
"versionType": "git"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64015
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40933 · Revision 1
- Added to Heist Feed
- Publisher date