Insufficient RMP Checks in IOMMU Affecting AMD Products
CVE-2023-20585

5.6MEDIUM

Key Information:

Vendor

Amd
Status
Amd Epyc™ 7003 Series Processors
Amd Epyc™ 9004 Series Processors
Amd Epyc™ Embedded 7003 Series Processors
Amd Epyc™ Embedded 9004 Series Processors
Vendor
CVE Published:
16 April 2026

What is CVE-2023-20585?

The vulnerability arises from insufficient validation of the Remapping Protection Mechanism (RMP) when accessing host buffers in AMD's IOMMU implementations. An attacker with sufficient privileges, specifically through a compromised hypervisor, could exploit this weakness to trigger an out of bounds condition, potentially leading to unauthorized access and loss of integrity for confidential guest data. This issue underscores the importance of rigorous security checks in hypervisor and memory access mechanisms to maintain system integrity.

Affected Version(s)

AMD EPYC™ 7003 Series Processors SEV FW 1.37.23

AMD EPYC™ 9004 Series Processors SEV FW 1.37.31

AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 1.0.0.B

References

https://www.amd.com/en/resources/product-security/bulleti...

CVSS V4

Score:
5.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.