Low severity3.2NVD Advisory· Published Sep 5, 2025· Updated Apr 15, 2026

CVE-2024-21977

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.

Patches

Vulnerability mechanics

References

www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.htmlnvd
www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.htmlnvd
www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.htmlnvd

News mentions

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cvss	0.208
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000