Insufficient checks of the RMP on host buffer access in IOMMU may allow an attacker with…
Priority LOW 24CWE-788Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
Insufficient checks of the RMP on host buffer access in IOMMU may allow an attacker with privileges and a compromised hypervisor to trigger an out of bounds condition without RMP checks, resulting in a potential loss of confidential guest integrity.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00098 0th percentileScored 2026-11-07
Fix Partial AMD EPYC™ 7003 Series Processors (AMD): SEV FW 1.37.23AMD EPYC™ 9004 Series Processors (AMD): SEV FW 1.37.31+2 more productsRed Hat: 3 without a fix
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 | — | SEV FW 1.37.23 | Patch available | CNA |
| AMD | AMD EPYC™ 9004 Series Processors | — | SEV FW 1.37.31 | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | — | EmbMilanPI-SP3 1.0.0.B | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 9004 Series Processors | — | EmbGenoaPI-1.0.0.A | Patch available | CNA |
- AMD EPYC™ 7003 Series Processors VendorAMD Affected — Fixed in SEV FW 1.37.23 Patch available CNA
- AMD EPYC™ 9004 Series Processors VendorAMD Affected — Fixed in SEV FW 1.37.31 Patch available CNA
- AMD EPYC™ Embedded 7003 Series Processors VendorAMD Affected — Fixed in EmbMilanPI-SP3 1.0.0.B Patch available CNA
- AMD EPYC™ Embedded 9004 Series Processors VendorAMD Affected — Fixed in EmbGenoaPI-1.0.0.A Patch available CNA
Remediation
- Fix · CNA AMD EPYC™ 7003 Series Processors (AMD) Fixed in SEV FW 1.37.23
- Fix · CNA AMD EPYC™ 9004 Series Processors (AMD) Fixed in SEV FW 1.37.31
- Fix · CNA AMD EPYC™ Embedded 7003 Series Processors (AMD) Fixed in EmbMilanPI-SP3 1.0.0.B
- Fix · CNA AMD EPYC™ Embedded 9004 Series Processors (AMD) Fixed in EmbGenoaPI-1.0.0.A
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20585
- 2026-10-03 Alias added: GHSA-c43c-pr38-m5g2
- 2026-10-29 Affected versions changed · Red Hat
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-2023-20585 · CVE Program
- CVE-2023-20585 · NVD
- FIRST EPSS
- GHSA-c43c-pr38-m5g2 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-20585 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences