Out-of-bounds write in 2nd Gen AMD EPYC Processors and 3rd Gen AMD EPYC Processors - CVE-2023-20533

Vulnerability identifier: #VU84020

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-2023-20533

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: AMD

Affected software:
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors

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

The vulnerability exists due to a boundary error when processing DRAM address in System Management Unit (SMU). A local user can trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3002.html