CVE-2021-26386 Memory corruption in Athlon™ Series
A malicious application can trigger memory corruption in the AMD Stage 2 Bootloader via malformed system calls, leading to arbitrary code execution.
- 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-2021-26386?
CVE-2021-26386 is a high-severity memory corruption vulnerability in AMD Athlon™ Series, published on 12 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2 Bootloader potentially leading to corrupt memory and code execution.
Weakness: CWE-787
Which versions are affected by CVE-2021-26386?
It affects 70 products.
Products include Amd Ryzen 3 2200u Firmware, Amd Ryzen 3 2300u Firmware, Amd Ryzen 3 3100 Firmware, Amd Ryzen 3 3300g Firmware, Amd Ryzen 3 3300x Firmware, Amd Ryzen 3 5125c Firmware and 64 more.
How do I fix CVE-2021-26386?
No fix has been published for CVE-2021-26386 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-2021-26386 being exploited?
There is no known exploitation of CVE-2021-26386 in the wild and no public exploit code.
Other vulnerabilities in AMD Athlon™ Series
Sources
Also known as GHSA-q5m8-56v3-xhv7.