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Status published
Low
CVE-2024-21977
Incomplete cleanup after loading a CPU microcode patch may allow...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
Affected Software
AMD EPYC™ 7003 Series Processors, AMD EPYC™ 9004 Series Processors, AMD EPYC™ 8004 Series Processors, AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors, AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics, AMD Ryzen™ 5000 Series Desktop Processors, AMD Ryzen™ 7000 Series Desktop Processors, AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics, AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors, AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 8000 Series Desktop Processors, AMD EPYC™ Embedded 7003 Series Processors, AMD EPYC™ Embedded 9004 Series Processors, AMD Ryzen™ Embedded 8000 Series Processors, AMD Ryzen™ Embedded 7000 Series Processors, AMD Ryzen™ Embedded 5000 Series Processors, AMD Ryzen™ Embedded V3000 Series Processors
Vulnerable Versions:
MilanPI 1.0.0.D, GenoaPI 1.0.0.C, ChagallWSPI-sWRX8 1.0.0.8, CezannePI-FP6_1.0.1.1, RembrandtPI-FP7/FP7r2_1.0.0.B, ComboAM4v2 1.2.0.Cb, ComboAM5 1.2.0.1, PhoenixPI-FP8-FP7_1.1.0.3, DragonRangeFL1 1.0.0.3e, EmbMilanPI-SP3 1.0.0.9, EmbGenoaPI-SP5 1.0.0.9, EmbeddedPhoenixPI-FP7r2_1.2.0.0, EmbeddedAM5PI 1.0.0.3, EmbAM4PI 1.0.0.7, Embedded-PI_FP7r2 100A
Timeline
Official Publish:
September 5th, 2025
Last Modified:
September 5th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N
Weaknesses (CWE)
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.