CVE-2021-26381 Memory corruption in AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics
A malicious driver can corrupt kernel memory via improper system call validation in AMD Trusted OS, potentially enabling code execution or privilege escalation.
- 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-2021-26381?
CVE-2021-26381 is a high-severity memory corruption vulnerability in AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.
Weakness: CWE-770
Which versions are affected by CVE-2021-26381?
How do I fix CVE-2021-26381?
No fix has been published for CVE-2021-26381 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-2021-26381 being exploited?
There is no known exploitation of CVE-2021-26381 in the wild and no public exploit code.
Sources
Also known as GHSA-99jj-mrwr-6crm.