CVE-2025-52536

MEDIUM

AMD EPYC 7003/8004/9004/9005 & Embedded 7003/9004/9005 Firmware Downgrade via SEV Lock Bit

Title source: llm

Description

Improper Prevention of Lock Bit Modification in SEV firmware could allow a privileged attacker to downgrade firmware potentially resulting in a loss of integrity.

References (1)

Core 1

Core References

Vendor Advisory

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3023.html

Scores

CVSS v4 6.7

EPSS 0.0002

EPSS Percentile 5.0%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1231

Status published

Products (9)

AMD/AMD EPYC™ 7003 Series Processors MilanPI 1.0.0.H

AMD/AMD EPYC™ 8004 Series Processors GenoaPI 1.0.0.G

AMD/AMD EPYC™ 9004 Series Processors GenoaPI 1.0.0.G

AMD/AMD EPYC™ 9005 Series Processors TurinPI 1.0.0.5

AMD/AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 v9 1.0.0.C

AMD/AMD EPYC™ Embedded 8004 Series Processors EmbGenoaPI-SP5 1.0.0.B

AMD/AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") EmbGenoaPI-SP5 1.0.0.B

AMD/AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") EmbGenoaPI-SP5 1.0.0.B

AMD/AMD EPYC™ Embedded 9005 Series Processors EmbTurinPI-SP5_1.0.0.1

Published Feb 10, 2026

Tracked Since Feb 18, 2026