CVE-2023-20591

Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform...

6.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.30%Up 0.3 points since Aug 14, 2024

What each source reports

CVE List Score used 6.5

Record: CVE-2023-20591
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Weakness: CWE-665
Updated: 2026-11-02

EUVDEUVD-2023-24770 6.5

Record: EUVD-2023-24770
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-v8c4-4ghf-7jv6 6.5

Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform...

Record: GHSA-v8c4-4ghf-7jv6
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Weakness: CWE-665
Updated: 2026-11-02

NVD 6.5

Record: CVE-2023-20591
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS 3.1: 10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-665
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-20591 is a medium vulnerability (CVSS 6.5) in Amd Epyc™ 7003 Series Processors, published August 13, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.