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.

Attack Vector Local

Attack Complexity High

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
AMD AMD Ryzen™ 3000 Series Desktop Processors affected
Version Status Constraints
ComboAM4 1.0.0.E unaffected —
ComboAM4v2PI 1.2.0.CA unaffected —
AMD AMD Ryzen™ 5000 Series Desktop Processors affected
Version Status Constraints
ComboAM4v2PI 1.2.0.CA unaffected —
AMD AMD Ryzen™ Threadripper™ 3000 Series Processors affected
Version Status Constraints
CastlePeakPI-SP3r3 1.0.0.C unaffected —
AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors affected
Version Status Constraints
CastlePeakWSPI-sWRX8 1.0.0.E unaffected —
AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors affected
Version Status Constraints
ChagallWSPI-sWRX8 1.0.0.9 unaffected —

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html cve-icon
History

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: 2026-06-26T17:45:03Z

Weaknesses