Timing Discrepancy Vulnerability in AMD Products
CVE-2023-20540

1.8LOW

Key Information:

Vendor

Amd
Status
Amd Ryzen™ 3000 Series Desktop Processors
Amd Ryzen™ 5000 Series Desktop Processors
Amd Ryzen™ Threadripper™ 3000 Series Processors
Amd Ryzen™ Threadripper™ Pro 3000wx Series Processors
Vendor
CVE Published:
26 June 2026

What is CVE-2023-20540?

A detectable timing discrepancy in AMD Software can enable privileged attackers to execute brute-force attacks against the hash message authentication code. This vulnerability may allow unauthorized input manipulation, resulting in a potential loss of data integrity. To mitigate risks, affected users should ensure they are using the latest security patches and regularly review their security protocols.

Affected Version(s)

AMD Ryzen™ 3000 Series Desktop Processors ComboAM4 1.0.0.E

AMD Ryzen™ 5000 Series Desktop Processors ComboAM4v2PI 1.2.0.CA

AMD Ryzen™ Threadripper™ 3000 Series Processors CastlePeakPI-SP3r3 1.0.0.C

References

https://www.amd.com/en/resources/product-security/bulleti...

CVSS V4

Score:
1.8
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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