CVE-2021-26391

Name: CVE-2021-26391
Creator: NVD / NIST
Published: 2022-11-09T21:15:12.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2021-26391 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Insufficient verification of multiple header signatures while loading a Trusted Application (TA) may allow an attacker with privileges to gain code execution in that TA or the OS/kernel.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

Insufficient verification of multiple header signatures while loading a Trusted Application (TA) may allow an attacker with privileges to gain code execution in that TA or the OS/kernel.

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

0.17%

6.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Amd	Enterprise Driver	< 22.10.20
Amd	Radeon Pro Software	< 22.q2
Amd	Radeon Software	< 22.5.2
Amd	Radeon Rx Vega 56 Firmware	All versions
Amd	Radeon Rx Vega 64 Firmware	All versions
Amd	Ryzen 3 5300ge Firmware	All versions
Amd	Ryzen 3 5300g Firmware	All versions
Amd	Ryzen 5 5600ge Firmware	All versions
Amd	Ryzen 5 5600g Firmware	All versions
Amd	Ryzen 7 5700ge Firmware	All versions
Amd	Ryzen 7 5700g Firmware	All versions
Amd	Ryzen 3 5300u Firmware	All versions
Amd	Ryzen 5 5500u Firmware	All versions
Amd	Ryzen 7 5700u Firmware	All versions
Amd	Ryzen 3 5400u Firmware	All versions
Amd	Ryzen 5 5560u Firmware	All versions
Amd	Ryzen 5 5600u Firmware	All versions
Amd	Ryzen 5 5600h Firmware	All versions
Amd	Ryzen 5 5600hs Firmware	All versions
Amd	Ryzen 7 5800u Firmware	All versions
Amd	Ryzen 7 5800h Firmware	All versions
Amd	Ryzen 7 5800hs Firmware	All versions
Amd	Ryzen 9 5900hs Firmware	All versions
Amd	Ryzen 9 5900hx Firmware	All versions
Amd	Ryzen 9 5980hs Firmware	All versions
Amd	Ryzen 9 5980hx Firmware	All versions

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1029Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1029Vendor Advisory

Timeline

Published: Nov 9, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26391?

Insufficient verification of multiple header signatures while loading a Trusted Application (TA) may allow an attacker with privileges to gain code execution in that TA or the OS/kernel.

How severe is CVE-2021-26391?

CVE-2021-26391 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26391?

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-2021-26391?

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

Scan your code now

Source: NVD / NIST