CVE-2024-21977 – AMD SEV-SNP RDRAND Entropy Depletion Vulnerability

The following table lists the changes that have been made to the
CVE-2024-21977 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Sep. 05, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N
    Added CWE CWE-459
    Added Reference https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.html
    Added Reference https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html
    Added Reference https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html
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