CVE-2023-20585

MEDIUM

AMD EPYC 7003/9004 and Embedded 7003/9004 Series Processors - Use-After-Free in IOMMU RMP Host Buffer Access

Title source: llm

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.

References (1)

Core 1

Core References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3016.html

Scores

CVSS v4 5.6

EPSS 0.0010

EPSS Percentile 0.9%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-788

Status published

Products (4)

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

Published Apr 16, 2026

Tracked Since Apr 17, 2026