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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.

PUBLISHED Reserved 2022-10-27 | Published 2026-06-26 | Updated 2026-06-26 | Assigner AMD




LOW: 1.8CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-208 Observable timing discrepancy

Product status

Default status
affected

ComboAM4 1.0.0.E
unaffected

ComboAM4v2PI 1.2.0.CA
unaffected

Default status
affected

ComboAM4v2PI 1.2.0.CA
unaffected

Default status
affected

CastlePeakPI-SP3r3 1.0.0.C
unaffected

Default status
affected

CastlePeakWSPI-sWRX8 1.0.0.E
unaffected

Default status
affected

ChagallWSPI-sWRX8 1.0.0.9
unaffected

References

www.amd.com/...es/product-security/bulletin/amd-sb-4012.html

cve.org (CVE-2023-20540)

nvd.nist.gov (CVE-2023-20540)

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