CVE-2021-26331 Code injection in 1st Gen AMD EPYC™
A malicious user can manipulate AMD SMU mailbox entries to achieve arbitrary code execution on EPYC processors.
- 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-2021-26331?
CVE-2021-26331 is a high-severity code injection vulnerability in Amd Epyc 7232p Firmware, published on 16 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
Weakness: CWE-20
Which versions are affected by CVE-2021-26331?
It affects 58 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7002 Firmware, Amd Epyc 7003 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 52 more.
How do I fix CVE-2021-26331?
No fix has been published for CVE-2021-26331 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-2021-26331 being exploited?
There is no known exploitation of CVE-2021-26331 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
- CVE-2021-26340 A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation
- CVE-2021-26398 Memory corruption in 1st Gen EPYC
- CVE-2021-26335 Code injection in Athlon™ Series
- CVE-2023-20578 Race condition in AMD EPYC™ 7001 Processors
- CVE-2020-12988 Denial of service in 1st/2nd/3rd Gen AMD EPYC™ Processors
Sources
Also known as GHSA-945g-xqmp-7xg3.