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Microsoft Security Response CenterCVE-2023-20585

AMD: CVE-2023-20585 IOMMU Write Buffer Vulnerability

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]

Read the vendor bulletin Get alerts for Windows Server 2025 (Server Core installation)
5.3CVSS out of 10High severity
Scope

What the vendor says is affected

  • 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

Versions the vendor lists as fixed

  • 10.0.26100.32690
  • 10.0.26200.8246
  • 10.0.26100.8246
Next step

What the vendor recommends

Install KB5082063. Install KB5083769.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  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.

Vulnerabilities

CVEs named in this advisory

CVE-2023-20585View CVSS, KEV, EPSS, and threat context
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