#VU96630 Permissions, Privileges, and Access Controls in AMD products - CVE-2021-26367

Vulnerability identifier: #VU96630

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-26367

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
AMD Radeon Instinct MI50
AMD Instinct MI100
AMD Radeon Instinct MI25
AMD Radeon PRO V520
AMD Radeon PRO V620
Radeon RX 6000 Series
Radeon PRO W6000 Series

Software vendor:
AMD

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper access restrictions. A local user can misconfigure the Trusted Memory Regions (TMRs) and set an arbitrary address range for the TMR, leading to privilege escalation.

Install updates from vendor's website.

• https://www.amd.com/en/resources/product-security/bulletin/amd-sb-6005.html