CVE-2023-20584 Affecting amd64-microcode package, versions <3.20250311.1ubuntu0.24.04.1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-UBUNTU2404-AMD64MICROCODE-8323760
  • published22 Mar 2026
  • disclosed13 Aug 2024

Introduced: 13 Aug 2024

CVE-2023-20584  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 amd64-microcode to version 3.20250311.1ubuntu0.24.04.1 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:24.04 relevant fixed versions and status.

IOMMU improperly handles certain special address ranges with invalid device table entries (DTEs), which may allow an attacker with privileges and a compromised Hypervisor to induce DTE faults to bypass RMP checks in SEV-SNP, potentially leading to a loss of guest integrity.

CVSS Base Scores

version 3.1