Summary of Intel microcode updates

Applies to: Windows 10, version 1803Windows Server version 1803Windows 10, version 1709 More

Intel microcode updates


Microsoft is making available Intel-validated microcode updates that are related to Spectre Variant 2 (CVE 2017-5715 [“Branch Target Injection”]).

The following table lists specific Microsoft Knowledge Base articles by Windows version. The article contains links to the available Intel microcode updates by CPU:

KB Number and Description

Windows Version

Source

KB4100347 Intel Microcode Updates

Windows 10, version 1803, and Windows Server, version 1803

Windows Update, Windows Server Update Service, and Microsoft Update Catalog

KB4090007 Intel Microcode Updates

Windows 10, version 1709, and Windows Server 2016, version 1709

Windows Update, Windows Server Update Service, and Microsoft Update Catalog

KB4091663 Intel Microcode Updates

Windows 10, version 1703

Windows Update, Windows Server Update Service, and Microsoft Update Catalog

KB4091664 Intel Microcode Updates

Windows 10, version 1607, and Windows Server 2016

Windows Update, Windows Server Update Service, and Microsoft Update Catalog

KB4091666 Intel Microcode Updates

Windows 10 (RTM)

Windows Update, Windows Server Update Service, and Microsoft Update Catalog

Microsoft is making available Intel-validated microcode updates that are related to Spectre Variant 3a (CVE-2018-3640: "Rogue System Register Read (RSRE)"), Spectre Variant 4 (CVE-2018-3639: "Speculative Store Bypass (SSB)"), and L1TF (CVE-2018-3620, CVE-2018-3646: "L1 Terminal Fault"). 

The following table lists specific Microsoft Knowledge Base articles by Windows version. The article contains links to the available Intel microcode updates by CPU.

KB number and description

Windows version

Source

KB4346084 Intel microcode updates Windows 10, version 1803, and Windows Server, version 1803 Microsoft Update Catalog
KB4346085 Intel microcode updates Windows 10, version 1709, and Windows Server 2016, version 1709 Microsoft Update Catalog
KB4346086 Intel microcode updates Windows 10, version 1703 Microsoft Update Catalog
KB4346087 Intel microcode updates Windows 10, version 1607, and Windows Server 2016 Microsoft Update Catalog
KB4346088 Intel microcode updates Windows 10 (RTM) Microsoft Update Catalog


We will offer additional Intel-validated microcode updates for Windows as they become available to Microsoft, and update these articles accordingly.

Customers should refer to information from Intel and their device manufacturer about the availability of applicable firmware security updates for the specific device, including the Intel Microcode Revision Guidance (April 2, 2018), Intel Microcode Revision Guidance (June 22, 2018), and Intel Microcode Revision Guidance (August 8, 2018).