CVE-2024-21977

Published: Sep 5, 2025Modified: Jun 17, 2026Deferred

3.2

Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N

Exploitability: 1.5 / Impact: 1.4

Source: psirt@amd.com (Secondary)

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.

Related CWEs

CWE-459

Incomplete Cleanup

The product does not properly "clean up" and remove temporary or supporting resources after they have been used.

References (3)

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.html

Source: psirt@amd.com

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html

Source: psirt@amd.com

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html

Source: psirt@amd.com

Timeline

No history available yet.