CVE-2024-56161

Publication date 3 February 2025

Last updated 9 June 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.2 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
amd64-microcode 25.04 plucky
Fixed 3.20250311.1ubuntu0.25.04.1
24.10 oracular
Fixed 3.20250311.1ubuntu0.24.10.1
24.04 LTS noble
Fixed 3.20250311.1ubuntu0.24.04.1
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

rodrigo-zaiden

This CVE tracks the AMD SEV-SNP firmware that exists in amd64-microcode package. CVE-2024-36347 is somewhat related to this CVE, but tracks the changes applied to the Linux kernel AMD SEV firmware were included in noble onwards, based on upstream release 20220411, releases older than that are not supported.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
amd64-microcode

Severity score breakdown

Parameter Value
Base score 7.2 · High
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N