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    CVE-2024-21977

    Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests.

    Published:Sep 5, 2025
    Last Modified:Apr 15, 2026
    EPS:Sep 5, 2025
    EPSS Score:0.00015
    CVSS Score:3.2

    Affected Products

    Vendor
    Amd
    Product
    Epyc
    Vendor
    Amd
    Product
    Epyc 7003
    Vendor
    Amd
    Product
    Epyc 8004
    Vendor
    Amd
    Product
    Epyc 9004
    Vendor
    Amd
    Product
    Epyc Embedded 7003
    Vendor
    Amd
    Product
    Epyc Embedded 9004
    Vendor
    Amd
    Product
    Ryzen 5000 Series Desktop Processors
    Vendor
    Amd
    Product
    Ryzen 5000 Series Mobile Processors With Radeon Graphics
    Vendor
    Amd
    Product
    Ryzen 6000 Series Processors With Radeon Graphics
    Vendor
    Amd
    Product
    Ryzen 7000 Series Desktop Processors
    Vendor
    Amd
    Product
    Ryzen 7030 Series Mobile Processors With Radeon Graphics

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-459 Incomplete Cleanup

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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