CVE-2021-26316 Memory corruption in 1st Gen EPYC
An attacker can execute arbitrary code in System Management Mode by tampering with the BIOS communication buffer.
- 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-2021-26316?
CVE-2021-26316 is a high-severity memory corruption vulnerability in Amd Epyc 7232p Firmware, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.
Weakness: CWE-20
Which versions are affected by CVE-2021-26316?
It affects 147 products.
Products include Amd Athlon 3050ge Firmware, Amd Athlon 3150g Firmware, Amd Athlon 3150ge Firmware, Amd Athlon Gold 3150c Firmware, Amd Athlon Gold 3150ge Firmware, Amd Athlon Gold 3150u Firmware and 141 more.
How do I fix CVE-2021-26316?
No fix has been published for CVE-2021-26316 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-2021-26316 being exploited?
There is no known exploitation of CVE-2021-26316 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-hr2h-gpm8-8hqc.