CVE-2021-26315 Code injection in 3rd Gen AMD EPYC™

What is CVE-2021-26315?

CVE-2021-26315 is a high-severity code injection vulnerability in Amd Epyc 72f3 Firmware, published on 16 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

When the AMD Platform Security Processor (PSP) boot rom loads, authenticates, and subsequently decrypts an encrypted FW, due to insufficient verification of the integrity of decrypted image, arbitrary code may be executed in the PSP when encrypted firmware images are used.

Weakness: CWE-345

Which versions are affected by CVE-2021-26315?

It affects 20 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 73f3 Firmware and 14 more.

How do I fix CVE-2021-26315?

No fix has been published for CVE-2021-26315 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-26315 being exploited?

There is no known exploitation of CVE-2021-26315 in the wild and no public exploit code.

Other vulnerabilities in Amd Epyc 72f3 Firmware

• CVE-2023-20530 Denial of service in 3rd Gen EPYC High 7.5
• CVE-2021-26343 Information disclosure in 3rd Gen EPYC Medium 5.5
• CVE-2021-26355 Denial of service in 3rd Gen EPYC Medium 5.5
• CVE-2021-26404 Information disclosure in 3rd Gen EPYC Medium 5.5
• CVE-2021-26327 Information disclosure in 3rd Gen AMD EPYC™ Medium 5.5

All Amd Epyc 72f3 Firmware vulnerabilities

Sources

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

Also known as GHSA-4qp6-97jw-9prg.