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    CVE-2025-52536

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

    Published:Feb 10, 2026
    Last Modified:Apr 15, 2026
    EPS:Feb 10, 2026
    EPSS Score:0.00017
    CVSS Score:6.7

    Affected Products

    Vendor
    Amd
    Product
    Epyc 7003 Series Processors
    Vendor
    Amd
    Product
    Epyc 8004 Series Processors
    Vendor
    Amd
    Product
    Epyc 9004 Series Processors
    Vendor
    Amd
    Product
    Epyc 9005 Series Processors
    Vendor
    Amd
    Product
    Epyc Embedded 7003 Series Processors
    Vendor
    Amd
    Product
    Epyc Embedded 8004 Series Processors
    Vendor
    Amd
    Product
    Epyc Embedded 9004 Series Processors
    Vendor
    Amd
    Product
    Epyc Embedded 9005 Series Processors

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-680 Exploitation of Improperly Controlled Registers

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    CVE-2023-31364 (CVSS 8.3) — Improper handling of direct memory writes in the input-output memory management unit could allow a malicious g…
    CVE-2025-52533 (CVSS 8.7) — Improper Access Control in an on-chip debug interface could allow a privileged attacker to enable a debug inte…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High