Improper Input Validation Affecting microcode_ctl package, versions <4:20220809-1.el9


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.27% (18th percentile)

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  • Snyk IDSNYK-RHEL9-MICROCODECTL-14287510
  • published10 Dec 2025
  • disclosed10 May 2022

Introduced: 10 May 2022

CVE-2022-21136  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:9 microcode_ctl to version 4:20220809-1.el9 or higher.
This issue was patched in RHBA-2022:8351.

NVD Description

Note: Versions mentioned in the description apply only to the upstream microcode_ctl package and not the microcode_ctl package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Improper input validation for some Intel(R) Xeon(R) Processors may allow a privileged user to potentially enable denial of service via local access.

CVSS Base Scores

version 3.1