KB4346088: Intel microcode updates

Applies to: Windows 10

Summary


Intel recently announced that they have completed software validations and have started to release new microcode for current CPU platforms in reaction to the following threats:

  • Spectre Variant 3a (CVE-2018-3640: "Rogue System Register Read (RSRE)")
  • Spectre Variant 4 (CVE-2018-3639: "Speculative Store Bypass (SSB)")
  • L1TF (CVE-2018-3620, CVE-2018-3646: "L1 Terminal Fault")

This new release includes a microcode update from Intel for the following CPUs.

Important Install this update for the listed processors only.

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

 

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 standalone package for this update, go to the Microsoft Update Catalog website.

More Information