Summary of Intel Microcode Updates

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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

KB4465065 Intel microcode updates

Windows 10, version 1809, Windows Server 2019

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

KB4346084 Intel microcode updates

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

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

KB4346085 Intel microcode updates

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

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

KB4346086 Intel microcode updates

Windows 10, version 1703

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

KB4346087 Intel microcode updates

Windows 10, version 1607, and Windows Server 2016

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

KB4346088 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 Microarchitectural Data Sampling (CVE-2019-11091, CVE-2018-12126, CVE-2018-12127, CVE-2018-12130). 

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

KB4497165 Intel microcode updates

Windows 10, version 1903 and 1909, Windows Server, version 1903 and 1909

Microsoft Update Catalog

KB4494174 Intel microcode updates

Windows 10, version 1809, Windows Server 2019

Microsoft Update Catalog

KB4494451 Intel microcode updates

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

Microsoft Update Catalog

KB4494452 Intel microcode updates

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

Microsoft Update Catalog

KB4494453 Intel microcode updates

Windows 10, version 1703

Microsoft Update Catalog

KB4494175 Intel microcode updates

Windows 10, version 1607, and Windows Server 2016

Microsoft Update Catalog

KB4494454 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 (August 8, 2018), and Intel Microcode Revision Guidance (May 14, 2019).

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