CVE-2021-26332 Other in 3rd Gen AMD EPYC™

High 7.1 Published 10 May 2022 Updated 16 Sep 2024

AMD EPYC firmware fails to verify TMR location, allowing potential integrity loss or availability disruption in SEV-ES environments.

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-2021-26332?

CVE-2021-26332 is a high-severity vulnerability in Amd Epyc 72f3 Firmware, published on 10 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Failure to verify SEV-ES TMR is not in MMIO space, SEV-ES FW could result in a potential loss of integrity or availability.

Which versions are affected by CVE-2021-26332?

It affects 23 products.

Products include Amd Epyc 72f3 Firmware, Amd Epyc 7313 Firmware, Amd Epyc 7313p Firmware, Amd Epyc 7343 Firmware, Amd Epyc 7373x Firmware, Amd Epyc 73f3 Firmware and 17 more.

How do I fix CVE-2021-26332?

No fix has been published for CVE-2021-26332 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-26332 being exploited?

There is no known exploitation of CVE-2021-26332 in the wild and no public exploit code.

All Amd Epyc 72f3 Firmware vulnerabilities

Sources

Also known as GHSA-ph9v-43mr-97hw.