Out-of-bounds write in AMD products - CVE-2021-26384

Vulnerability identifier: #VU63745

CSH Severity: Low

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

CVE-ID: CVE-2021-26384

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: AMD

Affected software:
AMD Ryzen 2000 series Desktop processor
AMD Ryzen 5000 Series Desktop processor with Radeon graphics
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 5000 Series Mobile processor with Radeon graphics

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in System Management Interface. A local user can run a specially crafted SMI command to establish a corrupted SMI Trigger Info data structure and perform a denial of service (DoS) attack.

Install updates from vendor's website.

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