KB4346088: Intel microcode updates

Applies to: Windows 10

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Summary

Intel recently announced that they have completed their validations and started to release microcode for recent CPU platforms related to Spectre Variant 3a (CVE-2018-3640: "Rogue System Register Read (RSRE)"), Spectre Variant 4 (CVE-2018-3639: "Speculative Store Bypass (SSB)"), L1TF (CVE-2018-3615, CVE-2018-3620, CVE-2018-3646: "L1 Terminal Fault"). In addition to microcode updates previously released in KB4091666 to address Spectre Variant 2 (CVE 2017-5715: "Branch Target Injection"), this update also includes microcode updates from Intel for the following CPUs.

Code Name	Product Collection	Product Names	CPUID	Intel microcode update revision
Skylake U23e	6th Generation Intel® Core™ Processor Family	Intel® Core™ Processor I7-6560U, I7-6567U, I7-6650U, I7-6660U Intel® Core™ Processor I5-6260U, I5-6267U, I5-6287U, I5-6360U Intel® Core™ Processor I3-6167U	406E3	0xC6
Skylake U	6th Generation Intel® Core™ Processors	Intel® Core™ Processor i7-6500U, i7-6510U, i7-6600U Intel® Core™ Processor i5-6200U, i5-6210U, i5-6300U, i5-6310U Intel® Core™ Processor i3-6100U, i3-6110U Intel® Pentium® Processor 4405U, 4415U Intel® Celeron® Processor 3855U, 3865U, 3955U, 3965U	406E3	0xC6
Skylake Y	6th Generation Intel® Core™ Processor Family	Intel® Core™ Processor m7-6Y75 Intel® Core™ Processor m5-6Y54, m5-6Y57 Intel® Core™ Processor m3-6Y30 Intel® Pentium® Processor 4405Y	406E3	0xC6
Skylake H	6th Generation Intel® Core™ Processor Family	Intel® Core™ Processor i7-6700HQ, i7-6770HQ, i7-6820HK, i7-6820HQ, i7-6870HQ, i7-6920HQ, i7-6970HQ Intel® Core™ Processor i5-6300HQ, i5-6350HQ, i5-6440HQ Intel® Core™ Processor i3-6100H	506E3	0xC6
Skylake S	6th Generation Intel® Core™ Processor Family	Intel® Core™ Processor i7-6700, i7-6700K, i7-6700T Intel® Core™ Processor i5-6400, i5-6400T, i5-6500, i5-6500T , i5-6600, i5-6600K, i5-6600T Intel® Core™ Processor i3-6100, i3-6100T, i3-6120, i3-6120T, i3-6300, i3-6300T, i3-6320, i3-6320T Intel® Pentium® Processor G4400, G4400T, G4420, G4420T, G4500, G4500T, G4520, G4520T, G4540 Intel® Celeron® Processor G3900, G3900T, G3920, G3920T, G3940	506E3	0xC6

This update is a stand-alone update that's available through the Microsoft Update Catalog and targeted to Windows 10 Release To Market (RTM). This update also includes Intel microcode updates that were already released for this operating system at the time of Release To Manufacturing (RTM).

We will offer additional microcode updates from Intel through this article for this operating system as they become available to Microsoft.

Please make sure that mitigation against Spectre Variant 2 is enabled through the registry settings that are documented in the following article:

Windows Client Guidance for IT Pros to protect against speculative execution side-channel vulnerabilities

Important
Refer to the websites for Intel and your device manufacturer for their microcode recommendations before you apply this update to your device.

Known issues

Microsoft is not aware of any issues that affect this update currently.

How to obtain and install the update

Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Source: https://support.microsoft.com/en-us/...rocode-updates

See also: KB4346088 Intel microcode updates for Windows 10 v1507 - August 21 - Windows 10 Forums

See also:

• KB4093836 Summary of Intel microcode updates
• KB4346084 Intel microcode updates for Windows 10 v1803 - August 21 - Windows 10 Forums
• KB4346085 Intel microcode updates for Windows 10 v1709 - August 21 - Windows 10 Forums
• KB4346087 Intel microcode updates for Windows 10 v1607 - August 21 - Windows 10 Forums

Direct download links for KB4346088 MSU file from Microsoft Update Catalog:

Download KB4346088 MSU for Windows 10 v1507 32-bit (x86) - 1.0 MB

Download KB4346088 MSU for Windows 10 v1507 64-bit (x64) - 1.0 MB

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Posted By: Brink
21 Aug 2018