CVE-2026-64015
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.
Affected versions
Fixed in
6.1.175,
6.6.142,
6.12.92,
6.18.34,
7.0.11,
7.1
and their respective stable series.
References
6 totalFrequently asked questions
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What is CVE-2026-64015?
CVE-2026-64015 is a unscored severity Linux kernel vulnerability . CVE-2026-64015 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64015?
Yes — CVE-2026-64015 has been patched. Fixed versions include 6.1.175, 6.6.142, 6.12.92 and others.
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Is CVE-2026-64015 actively exploited?
No — CVE-2026-64015 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.