CVE-2023-20573 Debug Exception Delivery in Secure Nested Paging

Low 3.2 Published 11 Jan 2024 Updated 20 Jun 2025

A privileged attacker can prevent debug exception delivery to SEV-SNP guests, hiding expected debug information from the guest.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-20573?

CVE-2023-20573 is a low-severity vulnerability in Amd Epyc 72f3 Firmware, published on 11 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A privileged attacker can prevent delivery of debug exceptions to SEV-SNP guests potentially resulting in guests not receiving expected debug information.

Weakness: CWE-693

Which versions are affected by CVE-2023-20573?

It affects 65 products.

Products include Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7303 Firmware, Amd Epyc 7303p Firmware, Amd Epyc 7313 Firmware and 59 more.

How do I fix CVE-2023-20573?

No fix has been published for CVE-2023-20573 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-20573 being exploited?

There is no known exploitation of CVE-2023-20573 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Amd Epyc 72f3 Firmware vulnerabilities

Sources

Also known as GHSA-6hrc-q74x-c8g8, openSUSE-SU-2024:13589-1.