CVE-2024-21977 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.html
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html

History

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		https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.html https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html
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'}`

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

Vulnrichment

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

NVD

Status : Awaiting Analysis

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

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

Link: CVE-2024-21977

Redhat

No data.

OpenCVE Enrichment

No data.

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