CVE-2023-20585 Affecting amd64-microcode package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-UBUNTU2404-AMD64MICROCODE-16100723
  • published1 Jul 2026
  • disclosed16 Apr 2026

Introduced: 16 Apr 2026

CVE-2023-20585  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:24.04 amd64-microcode.

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:24.04 relevant fixed versions and status.

Insufficient checks of the RMP on host buffer access in IOMMU may allow an attacker with privileges and a compromised hypervisor to trigger an out of bounds condition without RMP checks, resulting in a potential loss of confidential guest integrity.

CVSS Base Scores

version 3.1