CVE-2021-26378 Denial of service in Athlon™ Series
Insufficient bound checks in AMD SMU allow attackers to cause denial of service via invalid address space access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-26378?
CVE-2021-26378 is a medium-severity denial of service vulnerability in Amd Epyc 7232p Firmware, published on 11 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insufficient bound checks in the System Management Unit (SMU) may result in access to an invalid address space that could result in denial of service.
Weakness: CWE-119
Which versions are affected by CVE-2021-26378?
It affects 83 products.
Products include Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware, Amd Epyc 7282 Firmware, Amd Epyc 72f3 Firmware and 77 more.
How do I fix CVE-2021-26378?
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-2021-26378 being exploited?
There is no known exploitation of CVE-2021-26378 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-h8p7-r5rw-w964.