CVE-2021-46779 Memory corruption in 1st Gen EPYC

High 7.1 Published 10 Jan 2023 Updated 9 Apr 2025

Attackers can corrupt AMD Secure Processor memory via insufficient input validation, compromising integrity and availability of EPYC systems.

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-2021-46779?

CVE-2021-46779 is a high-severity memory corruption vulnerability in 1st Gen EPYC, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Insufficient input validation in SVC_ECC_PRIMITIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which may lead to potential loss of integrity and availability.

Weakness: CWE-787

Which versions are affected by CVE-2021-46779?

It affects 3 products.

Products include Amd Milanpi Firmware, Amd Naplespi Firmware, Amd Romepi Firmware.

How do I fix CVE-2021-46779?

No fix has been published for CVE-2021-46779 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-2021-46779 being exploited?

There is no known exploitation of CVE-2021-46779 in the wild and no public exploit code.

Sources

Also known as GHSA-jr89-38hw-mr2v.