CVE-2023-20577 Memory corruption in 2nd Gen AMD EPYC™ Processors
Heap overflow in AMD SMM module allows arbitrary code execution if combined with SPI flash write access.
- 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-2023-20577?
CVE-2023-20577 is a high-severity memory corruption vulnerability in 2nd Gen AMD EPYC™ Processors, published on 2 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.
Weakness: CWE-121
Which versions are affected by CVE-2023-20577?
How do I fix CVE-2023-20577?
No fix has been published for CVE-2023-20577 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-2023-20577 being exploited?
There is no known exploitation of CVE-2023-20577 in the wild and no public exploit code.
Sources
Also known as GHSA-hp78-wv22-mhmg.