# CVE-2023-20591: Other in AMD EPYC™ 7003 Series Processors

> Improper IOMMU re-initialization during DRTM events allows attackers to read or modify hypervisor memory, compromising confidentiality, integrity, and availability.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Aug 2024
- **Updated:** 13 Mar 2025
- **Also known as:** GHSA-v8c4-4ghf-7jv6

## What is CVE-2023-20591?

CVE-2023-20591 is a medium-severity vulnerability in Amd Epyc 72f3 Firmware, published on 13 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-665 (Improper Initialization)

## Which versions are affected by CVE-2023-20591?

It affects 65 products.


Products: Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7303 Firmware, Amd Epyc 7303p Firmware, Amd Epyc 7313 Firmware, Amd Epyc 7313p Firmware, Amd Epyc 7343 Firmware, Amd Epyc 7373x Firmware, Amd Epyc 73f3 Firmware, Amd Epyc 7413 Firmware, Amd Epyc 7443 Firmware, Amd Epyc 7443p Firmware, Amd Epyc 7453 Firmware, Amd Epyc 7473x Firmware, Amd Epyc 74f3 Firmware, Amd Epyc 7513 Firmware, Amd Epyc 7543 Firmware, Amd Epyc 7543p Firmware, Amd Epyc 7573x Firmware and 45 more.

## How do I fix CVE-2023-20591?

No fix has been published for CVE-2023-20591 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20591 being exploited?

There is no known exploitation of CVE-2023-20591 in the wild and no public exploit code.

## Other vulnerabilities in Amd Epyc 72f3 Firmware

- [CVE-2024-21980](https://insights.sbomify.com/CVE-2024-21980/): Memory corruption in 3rd Gen AMD EPYC™ Processors (high 7.9)
- [CVE-2023-20533](https://insights.sbomify.com/CVE-2023-20533/): Denial of service in 2nd Gen AMD EPYC™ Processors (medium 6.1)
- [CVE-2023-31355](https://insights.sbomify.com/CVE-2023-31355/): Memory corruption in 3rd Gen AMD EPYC™ Processors (medium 6.0)
- [CVE-2024-21978](https://insights.sbomify.com/CVE-2024-21978/): Information disclosure in 3rd Gen AMD EPYC™ Processors (medium 6.0)
- [CVE-2023-31346](https://insights.sbomify.com/CVE-2023-31346/): Information disclosure in 3rd Gen AMD EPYC™ Processors (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20591 and fix it if it is affected.

What it is: CVE-2023-20591 is a medium-severity vulnerability in Amd Epyc 72f3 Firmware, published on 13 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-20591 in the wild and no public exploit code.

Affected product: Amd Epyc 72f3 Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-20591/ (Markdown: https://insights.sbomify.com/CVE-2023-20591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20591
- OSV: https://osv.dev/vulnerability/CVE-2023-20591

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20591/
Summaries are generated and may contain mistakes; the official description above is the record.