CVE-2026-0438 Code injection in AMD EPYC™ 4004 Series Processors
A privileged attacker can execute arbitrary code in System Management Mode on AMD processors, compromising system security.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-0438?
CVE-2026-0438 is a medium-severity code injection vulnerability in AMD EPYC™ 4004 Series Processors, published on 15 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A System Management Mode (SMM) handler could perform a callout to code located in non-SMM/untrusted memory. A highly privileged attacker could, with active user interaction and under high complexity and present preconditions, trigger execution of attacker-controlled code in SMM, potentially compromising the system’s confidentiality, integrity, and availability.
Weakness: CWE-1072
Which versions are affected by CVE-2026-0438?
How do I fix CVE-2026-0438?
No fix has been published for CVE-2026-0438 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-0438 being exploited?
There is no known exploitation of CVE-2026-0438 in the wild and no public exploit code.
Sources
Also known as GHSA-783m-hm3h-gh75.