CVE-2021-46759 Memory corruption in Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”

Medium 6.1 Published 9 May 2023 Updated 27 Jan 2025

An attacker with physical access can exploit improper input validation in the AMD TEE to reveal secure bootloader memory contents via serial port.

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

What is CVE-2021-46759?

CVE-2021-46759 is a medium-severity memory corruption vulnerability in AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”, published on 9 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physical access and control of a Uapp that runs under the bootloader to reveal the contents of the ASP (AMD Secure Processor) bootloader accessible memory to a serial port, resulting in a potential loss of integrity.

Weakness: CWE-787

Which versions are affected by CVE-2021-46759?

It affects 56 products.

Products include Amd Athlon Gold 3150g Firmware, Amd Athlon Gold 3150ge Firmware, Amd Athlon Silver 3050ge Firmware, Amd Ryzen 1200 \(Af\) Firmware, Amd Ryzen 1600 \(Af\) Firmware, Amd Ryzen 2200g Firmware and 50 more.

How do I fix CVE-2021-46759?

No fix has been published for CVE-2021-46759 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-46759 being exploited?

There is no known exploitation of CVE-2021-46759 in the wild and no public exploit code.

Sources

Also known as GHSA-gp8r-64c4-ggqw.