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CVE-2024-21977

No fix known EPSS <1%CVSS 3.2

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.

Published 2025-09-05 · CVE record · OSV

Products: 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