Improper Handling of Overlap Between Protected Memory Ranges Affecting microcode_ctl package, versions <4:20260210-1.20260812.1.el9_8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-ALMALINUX9-MICROCODECTL-19902272
  • published18 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

CVE-2025-31936  (opens in a new tab)
CWE-1260  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 microcode_ctl to version 4:20260210-1.20260812.1.el9_8 or higher.
This issue was patched in ALSA-2026:68011.

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 AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM may allow an escalation of privilege. SMM adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

CVSS Base Scores

version 3.1