CVE-2021-46774 Denial of service in 1st Gen AMD EPYC™ Processors
Insufficient DRAM address validation in AMD SMU allows attackers to cause denial of service via invalid memory access.
- 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-2021-46774?
CVE-2021-46774 is a medium-severity denial of service vulnerability in Amd Epyc 7232p Firmware, 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
Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.
Which versions are affected by CVE-2021-46774?
It affects 137 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 131 more.
How do I fix CVE-2021-46774?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-46774 being exploited?
There is no known exploitation of CVE-2021-46774 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-2021-26331 Code injection in 1st Gen AMD EPYC™
- CVE-2021-26335 Code injection in Athlon™ Series
- CVE-2023-20578 Race condition in AMD EPYC™ 7001 Processors
Sources
Also known as GHSA-8wpw-g939-rjw4.