Vulnerability details
CVE-2026-64015
Linux Linux
security/keys: fix missed RCU read section on lookup
CVSS 3.1
7.8High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.13 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 5036a9aa7f21fbce89a2a8451bbc177bae2e920d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 4c5d407ba3ff7f30561ff73ba1b07ed70c864edc | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < cefa4265b11176c897a7d9e8e54d89e3701c5584 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 1d8d987a2aacde238ecd0f4946f28cef74c42b79 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 50bb3435a5e627bfbdc52eb4536f49f88b3486b8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 66288dcadf80974436250e9f70ed848836b835b5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 43a1e3744548e6fd85873e6fb43e293eb4010694 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 ≤ v < 5659e6923cb72f8e18e8b539109ab512455fe195 | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://git.kernel.org/stable/c/1d8d987a2aacde238ecd0f4946f28cef74c42b79
- https://git.kernel.org/stable/c/5036a9aa7f21fbce89a2a8451bbc177bae2e920d
- https://git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edc
- https://git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584
- https://git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195
- https://git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8
- https://git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5
- https://git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694
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Details
- Published
- 2026-07-19
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.15%
Probability of exploitation in 30 days
4.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')