CVE-2024-56161 Affecting amd64-microcode package, versions <3.20250311.1ubuntu0.25.04.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.1% (28th percentile)

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  • Snyk IDSNYK-UBUNTU2504-AMD64MICROCODE-9792000
  • published22 Mar 2026
  • disclosed3 Feb 2025

Introduced: 3 Feb 2025

CVE-2024-56161  (opens in a new tab)

How to fix?

Upgrade Ubuntu:25.04 amd64-microcode to version 3.20250311.1ubuntu0.25.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream amd64-microcode package and not the amd64-microcode package as distributed by Ubuntu. See How to fix? for Ubuntu:25.04 relevant fixed versions and status.

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP.

CVSS Base Scores

version 3.1