CVE-2024-21977 json
Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, po…
published 2025-09-05 14 mo ago modified 2026-11-09 5 h ago also EUVD-2024-19583
- cvss
- 3.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- AMD AMD EPYC™ 7003 Series Processors MilanPI 1.0.0.D
- AMD AMD EPYC™ 9004 Series Processors GenoaPI 1.0.0.C
- AMD AMD EPYC™ 8004 Series Processors GenoaPI 1.0.0.C
- AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors ChagallWSPI-sWRX8 1.0.0.8
- AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6_1.0.1.1
- AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics RembrandtPI-FP7/FP7r2_1.0.0.B
- AMD AMD Ryzen™ 5000 Series Desktop Processors ComboAM4v2 1.2.0.Cb
- AMD AMD Ryzen™ 7000 Series Desktop Processors ComboAM5 1.2.0.1
- AMD AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics PhoenixPI-FP8-FP7_1.1.0.3
- AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics RembrandtPI-FP7/FP7r2_1.0.0.B
- AMD AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics DragonRangeFL1 1.0.0.3e
- AMD AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors ChagallWSPI-sWRX8 1.0.0.8
- AMD AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics CezannePI-FP6_1.0.1.1
- AMD AMD Ryzen™ 8000 Series Desktop Processors ComboAM5 1.2.0.1
- AMD AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 1.0.0.9
- AMD AMD EPYC™ Embedded 9004 Series Processors EmbGenoaPI-SP5 1.0.0.9
- AMD AMD Ryzen™ Embedded 8000 Series Processors EmbeddedPhoenixPI-FP7r2_1.2.0.0
- AMD AMD Ryzen™ Embedded 7000 Series Processors EmbeddedAM5PI 1.0.0.3
- AMD AMD Ryzen™ Embedded 5000 Series Processors EmbAM4PI 1.0.0.7
- AMD AMD Ryzen™ Embedded V3000 Series Processors Embedded-PI_FP7r2 100A
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 14 mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N |
Affected products
- AMD AMD EPYC™ 7003 Series Processors
- AMD AMD EPYC™ 9004 Series Processors
- AMD AMD EPYC™ 8004 Series Processors
- AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors
- AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 5000 Series Desktop Processors
- AMD AMD Ryzen™ 7000 Series Desktop Processors
- AMD AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors
- AMD AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics
- AMD AMD Ryzen™ 8000 Series Desktop Processors
- AMD AMD EPYC™ Embedded 7003 Series Processors
- AMD AMD EPYC™ Embedded 9004 Series Processors
- AMD AMD Ryzen™ Embedded 8000 Series Processors
- AMD AMD Ryzen™ Embedded 7000 Series Processors
- AMD AMD Ryzen™ Embedded 5000 Series Processors
- AMD AMD Ryzen™ Embedded V3000 Series Processors
Classification
- Weakness
-
- CWE-459 Incomplete Cleanup
References
Sources
- CVE List CVE-2024-21977
- NVD CVE-2024-21977
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