CVE-2026-64015
- Source
- https://cve.org/CVERecord?id=CVE-2026-64015
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64015.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64015
- Downstream
- Published
- 2026-07-19T15:39:10.557Z
- Modified
- 2026-07-22T05:30:06.862029990Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- security/keys: fix missed RCU read section on lookup
- Details
-
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 assocarrayfind() in findkeytoupdate() without holding the RCU read lock, while the assocarray_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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64015.json" }- References
-
- https://git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694
- https://git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edc
- https://git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8
- https://git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195
- https://git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5
- https://git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64015.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64015
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedb2a4df200d570b2c33a57e1ebfa5896e4bc81b69Fixed4c5d407ba3ff7f30561ff73ba1b07ed70c864edcFixedcefa4265b11176c897a7d9e8e54d89e3701c5584Fixed5659e6923cb72f8e18e8b539109ab512455fe195Fixed50bb3435a5e627bfbdc52eb4536f49f88b3486b8Fixed66288dcadf80974436250e9f70ed848836b835b5Fixed43a1e3744548e6fd85873e6fb43e293eb4010694