# CVE-2023-20585

## Summary

- **CVE ID:** CVE-2023-20585
- **Severity:** MEDIUM
- **CVSS Score:** 5.6 (CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-788
- **Published:** Apr 16, 2026
- **Last Modified:** Apr 16, 2026

## Description

Insuffient checks of the RMP on host buffer access in IOMMU may allow an attacker with privileges and a compromised HV to trigger an out of bounds condition without RMP checks resulting in a potential loss of confidential guest integrity.

## Affected Products

- AMD — AMD EPYC™ 7003 Series Processors (SEV FW 1.37.23)
- AMD — AMD EPYC™ 9004 Series Processors (SEV FW 1.37.31)
- AMD — AMD EPYC™ Embedded 7003 Series Processors (EmbMilanPI-SP3 1.0.0.B)
- AMD — AMD EPYC™ Embedded 9004 Series Processors (EmbGenoaPI-1.0.0.A)

## References

- [CNA](https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3016.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._