Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to…
Priority LOW 15CWE-459Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00156 4th percentileScored 2026-11-07
Fix Fixed AMD EPYC™ 7003 Series Processors (AMD): MilanPI 1.0.0.DAMD EPYC™ 9004 Series Processors (AMD): GenoaPI 1.0.0.C+18 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AMD | AMD EPYC™ 7003 Series Processors | — | MilanPI 1.0.0.D | Patch available | CNA |
| AMD | AMD EPYC™ 9004 Series Processors | — | GenoaPI 1.0.0.C | Patch available | CNA |
| AMD | AMD EPYC™ 8004 Series Processors | — | GenoaPI 1.0.0.C | Patch available | CNA |
| AMD | AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors | — | ChagallWSPI-sWRX8 1.0.0.8 | Patch available | CNA |
| AMD | AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics | — | CezannePI-FP6_1.0.1.1 | Patch available | CNA |
| AMD | AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics | — | RembrandtPI-FP7/FP7r2_1.0.0.B | Patch available | CNA |
| AMD | AMD Ryzen™ 5000 Series Desktop Processors | — | ComboAM4v2 1.2.0.Cb | Patch available | CNA |
| AMD | AMD Ryzen™ 7000 Series Desktop Processors | — | ComboAM5 1.2.0.1 | Patch available | CNA |
| AMD | AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics | — | PhoenixPI-FP8-FP7_1.1.0.3 | Patch available | CNA |
| AMD | AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics | — | RembrandtPI-FP7/FP7r2_1.0.0.B | Patch available | CNA |
| AMD | AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics | — | DragonRangeFL1 1.0.0.3e | Patch available | CNA |
| AMD | AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors | — | ChagallWSPI-sWRX8 1.0.0.8 | Patch available | CNA |
| AMD | AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics | — | CezannePI-FP6_1.0.1.1 | Patch available | CNA |
| AMD | AMD Ryzen™ 8000 Series Desktop Processors | — | ComboAM5 1.2.0.1 | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | — | EmbMilanPI-SP3 1.0.0.9 | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 9004 Series Processors | — | EmbGenoaPI-SP5 1.0.0.9 | Patch available | CNA |
| AMD | AMD Ryzen™ Embedded 8000 Series Processors | — | EmbeddedPhoenixPI-FP7r2_1.2.0.0 | Patch available | CNA |
| AMD | AMD Ryzen™ Embedded 7000 Series Processors | — | EmbeddedAM5PI 1.0.0.3 | Patch available | CNA |
| AMD | AMD Ryzen™ Embedded 5000 Series Processors | — | EmbAM4PI 1.0.0.7 | Patch available | CNA |
| AMD | AMD Ryzen™ Embedded V3000 Series Processors | — | Embedded-PI_FP7r2 100A | Patch available | CNA |
- AMD EPYC™ 7003 Series Processors VendorAMD Affected — Fixed in MilanPI 1.0.0.D Patch available CNA
- AMD EPYC™ 9004 Series Processors VendorAMD Affected — Fixed in GenoaPI 1.0.0.C Patch available CNA
- AMD EPYC™ 8004 Series Processors VendorAMD Affected — Fixed in GenoaPI 1.0.0.C Patch available CNA
- AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors VendorAMD Affected — Fixed in ChagallWSPI-sWRX8 1.0.0.8 Patch available CNA
- AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics VendorAMD Affected — Fixed in CezannePI-FP6_1.0.1.1 Patch available CNA
- AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics VendorAMD Affected — Fixed in RembrandtPI-FP7/FP7r2_1.0.0.B Patch available CNA
- AMD Ryzen™ 5000 Series Desktop Processors VendorAMD Affected — Fixed in ComboAM4v2 1.2.0.Cb Patch available CNA
- AMD Ryzen™ 7000 Series Desktop Processors VendorAMD Affected — Fixed in ComboAM5 1.2.0.1 Patch available CNA
- AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics VendorAMD Affected — Fixed in PhoenixPI-FP8-FP7_1.1.0.3 Patch available CNA
- AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics VendorAMD Affected — Fixed in RembrandtPI-FP7/FP7r2_1.0.0.B Patch available CNA
- AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics VendorAMD Affected — Fixed in DragonRangeFL1 1.0.0.3e Patch available CNA
- AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors VendorAMD Affected — Fixed in ChagallWSPI-sWRX8 1.0.0.8 Patch available CNA
- AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics VendorAMD Affected — Fixed in CezannePI-FP6_1.0.1.1 Patch available CNA
- AMD Ryzen™ 8000 Series Desktop Processors VendorAMD Affected — Fixed in ComboAM5 1.2.0.1 Patch available CNA
- AMD EPYC™ Embedded 7003 Series Processors VendorAMD Affected — Fixed in EmbMilanPI-SP3 1.0.0.9 Patch available CNA
- AMD EPYC™ Embedded 9004 Series Processors VendorAMD Affected — Fixed in EmbGenoaPI-SP5 1.0.0.9 Patch available CNA
- AMD Ryzen™ Embedded 8000 Series Processors VendorAMD Affected — Fixed in EmbeddedPhoenixPI-FP7r2_1.2.0.0 Patch available CNA
- AMD Ryzen™ Embedded 7000 Series Processors VendorAMD Affected — Fixed in EmbeddedAM5PI 1.0.0.3 Patch available CNA
- AMD Ryzen™ Embedded 5000 Series Processors VendorAMD Affected — Fixed in EmbAM4PI 1.0.0.7 Patch available CNA
- AMD Ryzen™ Embedded V3000 Series Processors VendorAMD Affected — Fixed in Embedded-PI_FP7r2 100A Patch available CNA
Remediation
- Fix · CNA AMD EPYC™ 7003 Series Processors (AMD) Fixed in MilanPI 1.0.0.D
- Fix · CNA AMD EPYC™ 9004 Series Processors (AMD) Fixed in GenoaPI 1.0.0.C
- Fix · CNA AMD EPYC™ 8004 Series Processors (AMD) Fixed in GenoaPI 1.0.0.C
- Fix · CNA AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors (AMD) Fixed in ChagallWSPI-sWRX8 1.0.0.8
- Fix · CNA AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics (AMD) Fixed in CezannePI-FP6_1.0.1.1
- Fix · CNA AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics (AMD) Fixed in RembrandtPI-FP7/FP7r2_1.0.0.B
- Fix · CNA AMD Ryzen™ 5000 Series Desktop Processors (AMD) Fixed in ComboAM4v2 1.2.0.Cb
- Fix · CNA AMD Ryzen™ 7000 Series Desktop Processors (AMD) Fixed in ComboAM5 1.2.0.1
- Fix · CNA AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics (AMD) Fixed in PhoenixPI-FP8-FP7_1.1.0.3
- Fix · CNA AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics (AMD) Fixed in RembrandtPI-FP7/FP7r2_1.0.0.B
- Fix · CNA AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics (AMD) Fixed in DragonRangeFL1 1.0.0.3e
- Fix · CNA AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors (AMD) Fixed in ChagallWSPI-sWRX8 1.0.0.8
- Fix · CNA AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics (AMD) Fixed in CezannePI-FP6_1.0.1.1
- Fix · CNA AMD Ryzen™ 8000 Series Desktop Processors (AMD) Fixed in ComboAM5 1.2.0.1
- Fix · CNA AMD EPYC™ Embedded 7003 Series Processors (AMD) Fixed in EmbMilanPI-SP3 1.0.0.9
- Fix · CNA AMD EPYC™ Embedded 9004 Series Processors (AMD) Fixed in EmbGenoaPI-SP5 1.0.0.9
- Fix · CNA AMD Ryzen™ Embedded 8000 Series Processors (AMD) Fixed in EmbeddedPhoenixPI-FP7r2_1.2.0.0
- Fix · CNA AMD Ryzen™ Embedded 7000 Series Processors (AMD) Fixed in EmbeddedAM5PI 1.0.0.3
- Fix · CNA AMD Ryzen™ Embedded 5000 Series Processors (AMD) Fixed in EmbAM4PI 1.0.0.7
- Fix · CNA AMD Ryzen™ Embedded V3000 Series Processors (AMD) Fixed in Embedded-PI_FP7r2 100A
Timeline
- 2026-10-02 Threatist record created from CVE-2024-21977
- 2026-10-03 Alias added: GHSA-hw87-hg67-xw42
References
More AMD vulnerabilities
- TI-2026-36341 AI Tensor Engine for ROCm (AITER) 0.1.14 Unauthenticated RCE via MessageQueue.recv() Pickle Deserialization CVSS 4.0CRITICAL 9.2
- TI-2023-07046 Improper privilege management in AMD Radeon™ RX 5000 Series Graphics Cards CVSS 3.1HIGH 7.8
- TI-2023-04574 GPU kernel implementations susceptible to memory leak CVSS 3.1MEDIUM 6.5
- TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
- TI-2023-23747 PVRIC (PowerVR Image Compression) on Imagination 2018 and later GPU devices offers… CVSS 3.1MEDIUM 5.3
- TI-2022-07839 Improper access control in System Management Mode (SMM) may allow an attacker to write to… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2024-21977 · CVE Program
- CVE-2024-21977 · NVD
- FIRST EPSS
- GHSA-hw87-hg67-xw42 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences