CVE-2021-26327 Information disclosure in 3rd Gen AMD EPYC™

Medium 5.5 Published 16 Nov 2021 Updated 17 Sep 2024

Insufficient validation in AMD EPYC SNP firmware allows attackers to potentially compromise guest confidentiality.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-26327?

CVE-2021-26327 is a medium-severity vulnerability in Amd Epyc 72f3 Firmware, published on 16 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Insufficient validation of guest context in the SNP Firmware could lead to a potential loss of guest confidentiality.

Weakness: CWE-668, CWE-20

Which versions are affected by CVE-2021-26327?

It affects 20 products.

Products include Amd Epyc 7003 Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7313 Firmware, Amd Epyc 7313p Firmware, Amd Epyc 7343 Firmware, Amd Epyc 73f3 Firmware and 14 more.

How do I fix CVE-2021-26327?

No fix has been published for CVE-2021-26327 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-26327 being exploited?

There is no known exploitation of CVE-2021-26327 in the wild and no public exploit code.

All Amd Epyc 72f3 Firmware vulnerabilities

Sources

Also known as GHSA-qg7x-g66q-6pmh.