What’s Vulnerable › Vulnerabilities

CVE-2024-21977

• Severity: low (CVSS 3.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-05 · updated 2026-06-17
• Weakness: CWE-459

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.

Affected products

• AMD EPYC™ 7003 Series Processors: all versions
• AMD EPYC™ 8004 Series Processors: all versions
• AMD EPYC™ 9004 Series Processors: all versions
• AMD EPYC™ Embedded 7003 Series Processors: all versions
• AMD EPYC™ Embedded 9004 Series Processors: all versions
• AMD Ryzen™ 5000 Series Desktop Processors: all versions
• AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 7000 Series Desktop Processors: all versions
• AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics: all versions
• AMD Ryzen™ 8000 Series Desktop Processors: all versions
• AMD Ryzen™ Embedded 5000 Series Processors: all versions
• AMD Ryzen™ Embedded 7000 Series Processors: all versions
• AMD Ryzen™ Embedded 8000 Series Processors: all versions
• AMD Ryzen™ Embedded V3000 Series Processors: all versions
• AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors: all versions
• AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors: all versions

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

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