CVE-2023-20540

State: Published
Severity: 1.8 Low
Published: Jun 26, 2026
Updated: Jun 26, 2026
Reserved: Oct 27, 2022

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	1.8 Low	CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	AMD

Weaknesses

CWE-208 Observable timing discrepancy

Affected Products

Product	Versions
AMD Ryzen™ 3000 Series Desktop ProcessorsAMD	ComboAM4 1.0.0.ENot affected ComboAM4v2PI 1.2.0.CANot affected
AMD Ryzen™ 5000 Series Desktop ProcessorsAMD	ComboAM4v2PI 1.2.0.CANot affected
AMD Ryzen™ Threadripper™ 3000 Series ProcessorsAMD	CastlePeakPI-SP3r3 1.0.0.CNot affected
AMD Ryzen™ Threadripper™ PRO 3000WX Series ProcessorsAMD	CastlePeakWSPI-sWRX8 1.0.0.ENot affected
AMD Ryzen™ Threadripper™ PRO 5000 WX-Series ProcessorsAMD	ChagallWSPI-sWRX8 1.0.0.9Not affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.