CVE-2021-26367

Name: CVE-2021-26367
Creator: NVD / NIST
Published: 2024-08-13T17:15:17.36+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2021-26367 is a medium-severity vulnerability rated 6/10 on the CVSS scale. A malicious attacker in x86 can misconfigure the Trusted Memory Regions (TMRs), which may allow the attacker to set an arbitrary address range for the TMR, potentially leading to a loss of integrity and availability.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

A malicious attacker in x86 can misconfigure the Trusted Memory Regions (TMRs), which may allow the attacker to set an arbitrary address range for the TMR, potentially leading to a loss of integrity and availability.

Metrics

CVSS 3.1

6/10

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

EPSS Probability

0.16%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Amd	Radeon Software	< 23.12.1
Amd	Radeon Software	<= 23.q4
Amd	Ryzen 9 5980hx Firmware	< cezannepi-fp6_1.0.0.6
Amd	Ryzen 3 3300u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 3 3350u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 5 3450u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 5 3500u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 5 3500c Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 5 3550h Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 5 3580u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 7 3700u Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 7 3700c Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 7 3750h Firmware	< picassopi-fp5_1.0.0.e
Amd	Ryzen 7 3780u Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Gold 3150c Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Gold 3150u Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Pro 3145b Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Silver 3050c Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Silver 3050u Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Pro 3045b Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Silver 3050e Firmware	< picassopi-fp5_1.0.0.e
Amd	Athlon Gold Pro 3150g Firmware	< comboam4pi_1.0.0.9
Amd	Athlon Gold 3150g Firmware	< comboam4pi_1.0.0.9
Amd	Athlon Gold Pro 3150ge Firmware	< comboam4pi_1.0.0.9
Amd	Athlon Pro 300ge Firmware	< comboam4pi_1.0.0.9
Amd	Ryzen 3 4300ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 5 4600ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 7 4700ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 3 4300g Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 5 4600g Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 7 4700g Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 3 5300ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 3 5300g Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 5 5600ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 5 5600g Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 7 5700ge Firmware	< comboam4v2_pi_1.2.0.5
Amd	Ryzen 7 5700g Firmware	< comboam4v2_pi_1.2.0.5

References

https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4004.htmlVendor Advisory
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-6005.htmlVendor Advisory

Timeline

Published: Aug 13, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-26367?

How severe is CVE-2021-26367?

CVE-2021-26367 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26367?

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-2021-26367?

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

Scan your code now

Source: NVD / NIST