Information disclosure in AMD products - CVE-2021-26361

Vulnerability identifier: #VU63731

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-26361

CWE-ID: CWE-200

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to unspecified error. A malicious or compromised User Application (UApp) or AGESA Boot Loader (ABL) can be used to exfiltrate arbitrary memory from the ASP stage 2 bootloader potentially leading to information disclosure.

AMD Ryzen 2000 series Desktop processor
AMD Ryzen 5000 Series Desktop processor with Radeon graphics
2nd Gen AMD Ryzen Threadripper 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

Install updates from vendor's website.

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

• Multiple vulnerabilities in various AMD processors