CVE-2021-26343 Information disclosure in 3rd Gen EPYC
Malicious supervisor software can exploit insufficient validation in AMD EPYC BIOS to disclose sensitive memory contents.
- 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-2021-26343?
CVE-2021-26343 is a medium-severity vulnerability in Amd Epyc 72f3 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
Insufficient validation in ASP BIOS and DRTM commands may allow malicious supervisor x86 software to disclose the contents of sensitive memory which may result in information disclosure.
Weakness: CWE-668
Which versions are affected by CVE-2021-26343?
It affects 24 products.
Products include Amd Epyc 7003 Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7313 Firmware, Amd Epyc 7313p Firmware, Amd Epyc 7343 Firmware, Amd Epyc 7373x Firmware and 18 more.
How do I fix CVE-2021-26343?
No fix has been published for CVE-2021-26343 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26343 being exploited?
There is no known exploitation of CVE-2021-26343 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 72f3 Firmware
Sources
Also known as GHSA-m338-vvr5-wrph.