CVE-2021-26367

A malicious attacker in x86 can misconfigure the Trusted Memory Regions (TMRs), which may allow...

5.7 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

0.16%Up 0.1 points since Aug 14, 2024

What each source reports

CVE List Score used 5.7

Record: CVE-2021-26367
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

EUVDEUVD-2021-13173 5.7

Record: EUVD-2021-13173
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-2xq4-823c-q5v9 5.7

A malicious attacker in x86 can misconfigure the Trusted Memory Regions (TMRs), which may allow...

Record: GHSA-2xq4-823c-q5v9
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

NVD 5.7

Record: CVE-2021-26367
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1: 6.0 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-26367 is a medium vulnerability (CVSS 5.7) in Amd Athlon™ 3000 Series Desktop Processors With Radeon™ Graphics, published August 13, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 4th percentile. No source names a fixed version.