CVE-2026-64015 Affecting kernel-rt-debug-modules package, versions <0:4.18.0-553.162.1.rt7.503.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-ALMALINUX8-KERNELRTDEBUGMODULES-19675894
  • published11 Sept 2026
  • disclosed10 Sept 2026

Introduced: 10 Sep 2026

NewCVE-2026-64015  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 kernel-rt-debug-modules to version 0:4.18.0-553.162.1.rt7.503.el8_10 or higher.
This issue was patched in ALSA-2026:66324.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules package and not the kernel-rt-debug-modules package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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 Base Scores

version 3.1