CVE-2021-26350 Race condition in EPYC™ Processors

What is CVE-2021-26350?

CVE-2021-26350 is a medium-severity 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

A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in a potential denial of service.

Weakness: CWE-367

Which versions are affected by CVE-2021-26350?

It affects 44 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 38 more.

How do I fix CVE-2021-26350?

Apply the vendor's patch.

Is CVE-2021-26350 being exploited?

There is no known exploitation of CVE-2021-26350 in the wild and no public exploit code.

Other vulnerabilities in Amd Epyc 7232p Firmware

• CVE-2021-26379 Memory corruption in 2nd Gen AMD EPYC™ Critical 9.8
• CVE-2023-20520 Memory corruption in 1st Gen AMD EPYC™ Critical 9.8
• CVE-2021-46756 Denial of service in 1st Gen AMD EPYC™ Processors Critical 9.1
• CVE-2021-46769 Other in 2nd Gen AMD EPYC™ High 8.8
• CVE-2020-12944 Memory corruption in Athlon™ Series High 7.8

All Amd Epyc 7232p Firmware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x724-6q24-6qf9.