CVE-2023-20585
Received Received - Intake

IOMMU RMP Buffer Access Flaw Allows Guest Integrity Breach

Publication date: 2026-04-16

Last updated on: 2026-04-16

Assigner: Advanced Micro Devices Inc.

Description
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.

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Meta Information

Published
2026-04-16
Last Modified
2026-04-16
Generated
2026-07-07
AI Q&A
2026-04-16
EPSS Evaluated
2026-07-05
NVD
CVE-2023-20585
EUVD
EUVD-2023-24764

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
amd epyc_7003 1.37.23
amd epyc_8004 1.37.31
amd epyc_embedded_7003 1.0.0.B
amd epyc_embedded_9004 1.0.0.A

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-788 The product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability involves insufficient checks of the RMP (Reverse Map Table) on host buffer access within the IOMMU (Input-Output Memory Management Unit). An attacker who has privileges and has compromised the hypervisor (HV) can exploit this flaw to trigger an out-of-bounds condition without proper RMP checks.

This can lead to a potential loss of confidential guest integrity, meaning that the confidentiality of data within guest virtual machines could be compromised.

Impact Analysis

The impact of this vulnerability is a potential loss of confidential guest integrity. This means that sensitive data within virtual machines could be exposed or corrupted due to out-of-bounds memory access triggered by an attacker with elevated privileges and control over the hypervisor.

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