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.
History

Sun, 07 Sep 2025 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Amd
Amd epyc
Amd epyc 7003
Amd epyc 8004
Amd epyc 9004
Amd epyc Embedded 7003
Amd epyc Embedded 9004
Amd ryzen 5000 Series Desktop Processors
Amd ryzen 5000 Series Mobile Processors With Radeon Graphics
Amd ryzen 6000 Series Processors With Radeon Graphics
Amd ryzen 7000 Series Desktop Processors
Amd ryzen 7030 Series Mobile Processors With Radeon Graphics
Vendors & Products Amd
Amd epyc
Amd epyc 7003
Amd epyc 8004
Amd epyc 9004
Amd epyc Embedded 7003
Amd epyc Embedded 9004
Amd ryzen 5000 Series Desktop Processors
Amd ryzen 5000 Series Mobile Processors With Radeon Graphics
Amd ryzen 6000 Series Processors With Radeon Graphics
Amd ryzen 7000 Series Desktop Processors
Amd ryzen 7030 Series Mobile Processors With Radeon Graphics

Fri, 05 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 05 Sep 2025 13:15:00 +0000

Type Values Removed Values 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.
Weaknesses CWE-459
References
Metrics cvssV3_1

{'score': 3.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMD

Published: 2025-09-05T12:58:39.312Z

Updated: 2025-09-05T13:35:08.152Z

Reserved: 2024-01-03T16:43:30.196Z

Link: CVE-2024-21977

cve-icon Vulnrichment

Updated: 2025-09-05T13:34:59.694Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-05T13:15:31.310

Modified: 2025-09-05T17:47:10.303

Link: CVE-2024-21977

cve-icon Redhat

No data.