CVE-2025-21863 Affecting kernel-rt-debug-modules-core package, versions <0:6.12.0-124.8.1.el10_1


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.03% (10th percentile)

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  • Snyk IDSNYK-ALMALINUX10-KERNELRTDEBUGMODULESCORE-14120931
  • published26 Nov 2025
  • disclosed11 Nov 2025

Introduced: 11 Nov 2025

NewCVE-2025-21863  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 kernel-rt-debug-modules-core to version 0:6.12.0-124.8.1.el10_1 or higher.
This issue was patched in ALSA-2025:20095.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules-core package and not the kernel-rt-debug-modules-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

io_uring: prevent opcode speculation

sqe->opcode is used for different tables, make sure we santitise it against speculations.

CVSS Base Scores

version 3.1