Permissions, Privileges, and Access Controls in AMD products - CVE-2021-26366

Vulnerability identifier: #VU63733

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-26366

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: AMD

Affected software:
AMD Ryzen 2000 series Desktop processor
AMD Ryzen 3000 Series Desktop processor
AMD Ryzen 5000 Series Desktop processor
AMD Ryzen 5000 Series Desktop processor with Radeon graphics
2nd Gen AMD Ryzen Threadripper processors
3rd Gen AMD Ryzen Threadripper processors
AMD Ryzen Threadripper PRO processors
AMD Ryzen 2000 Series Mobile processor
AMD Ryzen 3000 Series Mobile processor
2nd Gen AMD Ryzen Mobile processor with Radeon graphics
AMD Athlon 3000 Series Mobile processors with Radeon Graphics
AMD Ryzen 3000 Series Mobile processor with Radeon graphics
AMD Ryzen 5000 Series Mobile processor with Radeon graphics

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to unspecified error. A local privileged user can read data from Boot ROM resulting in a loss of system integrity.

Install updates from vendor's website.

• https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027