CVE-2021-26315

Name: CVE-2021-26315
Creator: NVD / NIST
Published: 2021-11-16T19:15:07.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2021-26315 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.16%

5.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Amd	Epyc 7003 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 72f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7313 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7313p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7343 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 73f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7413 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7443 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7443p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7453 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 74f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7513 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7543 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7543p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 75f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7643 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7663 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7713 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7713p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7763 Firmware	< milanpi-sp3_1.0.0.4

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021Vendor Advisory

Timeline

Published: Nov 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26315?

How severe is CVE-2021-26315?

CVE-2021-26315 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26315?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26315?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST