Back to vendor advisories
Microsoft Security Response CenterCVE-2023-20585

AMD: CVE-2023-20585 IOMMU Write Buffer Vulnerability

HighVendor CVSS 5.3 / 10 1 CVE Published Apr 14, 2026 at 7:00 AM UTC

Summary

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]

Products covered

  • 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

Remediation

Install KB5082063. Install KB5083769.

Vendor-listed fixes

  • 10.0.26100.32690

  • 10.0.26200.8246

  • 10.0.26100.8246

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.