CVE-2023-20540

An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing arbitrary message input, potentially leading to a loss of data integrity.

Score

CVSS 4.0 1.8 Low

Status

Awaiting Analysis - psirt@amd.com

Published

2026-06-26

Last modified

2026-06-26

Weaknesses

CWE-208

Affected products

• Amd Ryzen 3000 Series Desktop Processors (Amd)
• Amd Ryzen 5000 Series Desktop Processors (Amd)
• Amd Ryzen Threadripper 3000 Series Processors (Amd)
• Amd Ryzen Threadripper Pro 3000wx Series Processors (Amd)
• Amd Ryzen Threadripper Pro 5000 Wx-series Processors (Amd)

References

• https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html