CVE-2021-26383 Memory corruption in AMD Instinct™ MI210
An attacker with compromised userspace can trigger out-of-bounds memory access in AMD TEE, causing integrity or availability loss.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26383?
CVE-2021-26383 is a high-severity memory corruption vulnerability in AMD Instinct™ MI210, published on 5 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.
Weakness: CWE-787
Which versions are affected by CVE-2021-26383?
How do I fix CVE-2021-26383?
No fix has been published for CVE-2021-26383 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-2021-26383 being exploited?
There is no known exploitation of CVE-2021-26383 in the wild and no public exploit code.
Sources
Also known as GHSA-89mm-wx6j-wpmg.