KB4093836: Summary of Intel Microcode Updates

Intel microcode updates​

Most recent vulnerability​

KB number and description	Windows version	Source
ADV220002	Windows 11, Windows 10, Windows 8.1, Windows Server 2022, Windows Server 2019, Windows Server 2016	Refer to OEM / Intel Firmware release of Microcode which needs to be updated for mitigation

Past vulnerabilities​

Spectre Variant 2​

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. These articles contain 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

Spectre Variant 3a, Spectre Variant 4, and L1TF vulnerabilities​

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 and 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

Microarchitectural Data Sampling vulnerability​

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 articles contain 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

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KB4093836: Summary of Intel Microcode Updates - Microsoft Support

Provides a summary of the articles related to the Intel Microcode Updates.

support.microsoft.com