CVE-2021-26317 Security feature bypass in Athlon™ Series

High 7.8 Published 12 May 2022 Updated 17 Sep 2024

Attackers can bypass SMM protocol verification to modify SPI flash, enabling arbitrary code execution on AMD Athlon and Ryzen processors.

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-2021-26317?

CVE-2021-26317 is a high-severity vulnerability in Amd Radeon Software, published on 12 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 the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resulting in a potential arbitrary code execution.

Which versions are affected by CVE-2021-26317?

It affects 74 products.

Products include Amd Athlon 3050ge Firmware, Amd Athlon 3150g Firmware, Amd Athlon 3150ge Firmware, Amd Radeon Software, Amd Ryzen 3 2200u Firmware, Amd Ryzen 3 2300u Firmware and 68 more.

How do I fix CVE-2021-26317?

No fix has been published for CVE-2021-26317 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-26317 being exploited?

There is no known exploitation of CVE-2021-26317 in the wild and no public exploit code.

All Amd Radeon Software vulnerabilities

Sources

Also known as GHSA-qc86-j87r-2654.