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.

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Vendors Products
Ryzen 3000 Series Desktop Processors Subscribe
Ryzen 5000 Series Desktop Processors Subscribe
Ryzen Threadripper 3000 Series Processors Subscribe
Ryzen Threadripper Pro 3000 Wx-series Processors Subscribe
Ryzen Threadripper Pro 5000 Wx-series Processors Subscribe
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Fixes

Solution

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Workaround

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History

Mon, 29 Jun 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Amd
Amd ryzen 3000 Series Desktop Processors
Amd ryzen 5000 Series Desktop Processors
Amd ryzen Threadripper 3000 Series Processors
Amd ryzen Threadripper Pro 3000 Wx-series Processors
Amd ryzen Threadripper Pro 5000 Wx-series Processors
Vendors & Products Amd
Amd ryzen 3000 Series Desktop Processors
Amd ryzen 5000 Series Desktop Processors
Amd ryzen Threadripper 3000 Series Processors
Amd ryzen Threadripper Pro 3000 Wx-series Processors
Amd ryzen Threadripper Pro 5000 Wx-series Processors

Fri, 26 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 26 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-208
References
Metrics cvssV4_0

{'score': 1.8, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMD

Published:

Updated: 2026-06-26T16:00:59.349Z

Reserved: 2022-10-27T18:53:39.742Z

Link: CVE-2023-20540

cve-icon Vulnrichment

Updated: 2026-06-26T16:00:53.648Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-29T20:06:31Z

Weaknesses