CVE-2026-64015 (GCVE-0-2026-64015)
Vulnerability from cvelistv5
Published
2026-07-19 15:39
Modified
2026-10-19 20:28
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Version: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
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