CVE-2023-20585: AMD: CVE-2023-20585 IOMMU Write Buffer Vulnerability

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C

Category

Tampering

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Apr

Released

2026-04-14

Description

The vulnerability assigned to this CVE could lead to corruption of guest encrypted memory. The mitigation for this vulnerability requires a Windows update. This CVE is being documented in the Security Update Guide to announce that the latest builds of Windows enable the mitigation and provide protection against the vulnerability. Please see the following for more information: [https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3016.html]

Affected Products (4)

Windows

• Windows Server 2025 (Server Core installation)
• Windows 11 Version 25H2 for x64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows Server 2025

Security Updates (2)

• 5082063
• 5083769

Revision History

• 2026-04-14: Information published.