KB4494454: Intel microcode updates

Applies to: Windows 10


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

  • CVE-2019-11091 – Microarchitectural Data Sampling Uncacheable Memory (MDSUM)
  • CVE-2018-12126 – Microarchitectural Store Buffer Data Sampling (MSBDS)?
  • CVE-2018-12127 – Microarchitectural Load Port Data Sampling (MLPDS)
  • CVE-2018-12130 – Microarchitectural Fill Buffer Data Sampling (MFBDS)

This new release is provided to Window Insider program Slow, Fast, and Release Preview rings, and includes a microcode update from Intel for the following CPUs. 

Code name

Product collection

Product names


Platform ID

Microcode update revision

Ivy Bridge

3rd Generation Intel® Core™

Processor Family

Intel® Celeron® Processor Family

Intel® Pentium® Processor Family

Intel® Core™ Processor Extreme Edition i7-3920XM, i7-3940XM

Intel® Celeron® Processor 1000M, 1005M, 1007U, 1017U, 1019Y, 1020E, 1020M, 1037U, 1047UE, 927UE, G1610, G1610T, G1620, G1620T, G1630

Intel® Core™ Processor i7-3517U, i7-3517UE, i7-3520M, i7-3537U, i7-3540M, i7-3555LE, i7-3610QE, i7-3610QM, i7-3612QE, i7-3612QM, i7-3612QM, i7-3615QE, i7-3615QM, i7-3630QM, i7-3632QM, i7-3632QM, i7-3635QM, i7-3667U, i7-3687U, i7-3689Y, i7-3720QM, i7-3740QM, i7-3770, i7-3770K, i7-3770S, i7-3770T, i7-3820QM, i7-3840QM

Intel® Core™ Processor i5-3210M, i5-3210M, i5-3230M, i5-3230M, i5-3317U, i5-3320M, i5-3330, i5-3330S, i5-3337U, i5-3339Y, i5-3340, i5-3340M, i5-3340S, i5-3350P, i5-3360M, i5-3380M, i5-3427U, i5-3437U, i5-3439Y, i5-3450, i5-3450S, i5-3470, i5-3470S, i5-3470T, i5-3475S, i5-3550, i5-3550S, i5-3570, i5-3570K, i5-3570S, i5-3570T, i5-3610ME

Intel® Core™ Processor i3-3110M, i3-3120M, i3-3120ME, i3-3130M, i3-3210, i3-3217U, i3-3217UE, i3-3220, i3-3220T, i3-3225, i3-3227U, i3-3229Y, i3-3240, i3-3240T, i3-3245, i3-3250, i3-3250T

Intel® Pentium® Processor 1405 v2, 2020M, 2030M, 2117U, 2127U, 2129Y, A1018, G2010, G2020, G2020T, G2030, G2030T, G2100T, G2120, G2120T, G2130, G2140




Haswell E, EP

Intel® Core™ X-series Processors

Intel® Xeon® Processor E5 v3 Family

Intel® Core™ Processor Extreme Edition i7-5960X

Intel® Core™ Processor i7-5820K, i7-5930K

Intel® Xeon® Processor v3 E5-1428L, E5-1603, E5-1607, E5-1620, E5-1630, E5-1650, E5-1660, E5-1680, E5-2408L, E5-2418L, E5-2428L, E5-2438L, E5-2603, E5-2608L, E5-2608L, E5-2609, E5-2618L, E5-2620, E5-2623, E5-2628L, E5-2630, E5-2630L, E5-2637, E5-2640, E5-2643, E5-2648L, E5-2650, E5-2650L, E5-2658, E5-2660, E5-2667, E5-2670, E5-2680, E5-2683, E5-2685, E5-2687W, E5-2690, E5-2695, E5-2697, E5-2698, E5-2699, E5-4610, E5-4620, E5-4627, E5-4640, E5-4648, E5-4650, E5-4655, E5-4660, E5-4667, E5-4669




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




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




Skylake D, Bakerville

Intel® Xeon® Processor D Family

Intel® Xeon® Processor D-2123IT, D-2141I, D-2142IT, D-2143IT, D-2145NT, D-2146NT, D-2161I, D-2163IT, D-2166NT, D-2173IT, D-2177NT, D-2183IT, D-2187NT




Skylake Server

Intel® Xeon® Scalable Processors

Intel® Xeon® Platinum Processor 8153, 8156, 8158, 8160, 8160F, 8160M, 8160T, 8164, 8168, 8170, 8170M, 8176, 8176F, 8176M, 8180, 8180M

Intel® Xeon® Gold Processor 5115, 5118, 5119T, 5120, 5120T, 5122, 6126, 6126F, 6126T, 6128, 6130, 6130F, 6130T, 6132, 6134, 6134M, 6136, 6138, 6138F, 6138T, 6140, 6140M, 6142, 6142F, 6142M, 6144, 6146, 6148, 6148F, 6150, 6152, 6154

Intel® Xeon® Silver Processor 4108, 4109T, 4110, 4112, 4114, 4114T, 4116, 4116T

Intel® Xeon® Bronze Processor 3104, 3106




Skylake W

Intel® Xeon® Processor W Family

Intel® Xeon® Processor W-2123, W-2125, W-2133, W-2135, W-2145, W-2155, W-2195, W-2175




Skylake X

Intel® Core™ X-series Processors

Intel® Core™ Extreme Edition Processor i9-7980XE Intel® Core™ X-series Processor i9-7900X, i9-7920X, i9-7940X, i9-7960X

Intel® Core™ X-series Processor i7-7800X, i7-7820X




Apollo Lake

Intel® Pentium® Processor J Series

Intel® Pentium® Processor N Series

Intel® Celeron® Processor J Series

Intel® Celeron® Processor N Series

Intel® Atom® Processor A Series

Intel® Atom® Processor E3900 Series

Intel® Pentium® Processor J4205, N4200

Intel® Celeron® Processor J3355, J3455, N3350, N3450

Intel® Atom® Processor x5-A3930, x5-A3940, x7-A3950, x7-A3960

Intel® Atom® Processor x5-E3930, x5-E3940, x7-E3950




Skylake Xeon E3

Intel® Xeon® Processor E3 v5 Family

Intel® Xeon® Processor v5 E3-1220, E3-1225, E3-1230, E3-1235L, E3-1240, E3-1240L, E3-1245, E3-1260L, E3-1270, E3-1275, E3-1280, E3-1505M, E3-1515M, E3-1535M, E3-1545M, E3-1558L, E3-1565L, E3-1575M, E3-1578L, E3-1585, E3-1585L




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




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




Gemini Lake

Intel® Pentium® Processor Silver Series

Intel® Celeron® Processor J Series

Intel® Celeron® Processor N Series

Intel® Pentium® Silver Processor J5005, N5000

Intel® Celeron® Processor J4005, J4105

Intel® Celeron® Processor N4000, N4100





This update is a standalone update that is targeted at Windows 10 RTM. This update also includes Intel microcode updates that were already released for these operating systems at the time of release to manufacturing (RTM). We will offer additional microcode updates from Intel through this article for these operating systems as they become available to Microsoft. Use the registry settings as described in the Windows client article. (By default, these registry settings are enabled for Windows client OS editions.)

Consult with your device manufacturer and Intel through their websites regarding their microcode recommendation for your device before you apply this update to your device.

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. 

Information about protection and security


To learn more about the Windows Insider Program, see our blog

Learn about the terminology that Microsoft uses to describe software updates.