CVE-2021-46766 Information disclosure in 4th Gen AMD EPYC™ Processors
A privileged attacker can access secret keys from ASP SRAM due to improper data clearing in AMD EPYC bootloader firmware.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-46766?
CVE-2021-46766 is a low-severity vulnerability in 4th Gen AMD EPYC™ Processors, published on 14 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.
Weakness: CWE-459
Which versions are affected by CVE-2021-46766?
It affects 28 products.
Products include Amd Epyc 9124 Firmware, Amd Epyc 9174f Firmware, Amd Epyc 9184x Firmware, Amd Epyc 9224 Firmware, Amd Epyc 9254 Firmware, Amd Epyc 9274f Firmware and 22 more.
How do I fix CVE-2021-46766?
Apply the vendor's patch.
Is CVE-2021-46766 being exploited?
There is no known exploitation of CVE-2021-46766 in the wild and no public exploit code.
Sources
Also known as GHSA-34xr-h92c-2m86.