CVE-2023-20592

Publication date 14 November 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

Improper or unexpected behavior of the INVD instruction in some AMD CPUs may allow an attacker with a malicious hypervisor to affect cache line write-back behavior of the CPU leading to a potential loss of guest virtual machine (VM) memory integrity.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
amd64-microcode	23.10 mantic	Not affected
	23.04 lunar	Not affected
	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	Ignored no real-world users

Notes

alexmurray

The microcode revisions listed in the AMD advisory AMD-SB-3005 were contained in the upstream commit b250b32ab1d044953af2dc5e790819a7703b7ee6 - this was already provided to the various Ubuntu releases in USN-6319-1 for CVE-2023-20569, as such they are not affected by this CVE.

Patch details

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

Package	Patch details
amd64-microcode	Upstream: ?id=b25

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N