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Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a targeted system and runs a specially crafted application that, by way of a race condition, results in references to memory locations that have already been freed. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS15-133.

More Information

Important

  • All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see
Get security updates automatically.

Note For Windows RT and Windows RT 8.1, this update is available through Windows Update only.

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS15-133 that corresponds to the version of Windows that you are running.

More Information

Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

File Information

File name

SHA1 hash

SHA256 hash

Windows8-RT-KB3109103-x64.msu

89D61082BFDA039DA1D77D64C4519405925B77F5

1B212216C638E1DF1539A94FF1F69C7E78B3A8B22B4DA21946EEE8C2987E67E1

Windows8.1-KB3109103-x86.msu

7879999F1AD4E307835C800722F5577FBBFF5152

330CC8F10E75F922B95186DD5091034C038AACE82F98D1D07A0EB6CF9F56F2F3

Windows8-RT-KB3109103-x86.msu

FBA9CE94EEEB92D6A3EB6407D189C97F72A54195

8A426E9294F41195F0E70641EBB27A34EF07A7035C353F06DC0B5D793E35FED3

Windows6.1-KB3109103-x86.msu

C0F1CE4EAFBE4A952A0FF22199F7952FD82B865F

39688BDC1FA9C409AE63ECC0F44940386393B1B6BCE59F451A2AE49F1F55D200

Windows6.0-KB3109103-ia64.msu

BE1B15BD13658B18B73843672502091608A11B95

8BCE33E79E14A69764CA824AC8F20CDBEA73EB15B7FA8002A79FC5178B254EB4

Windows6.0-KB3109103-x64.msu

92A49AA461DBE398F8EAF1A8DF7572903C59A6F5

3AB66CC3C2D8BA0B5AFBF5DC3903E2674B5BC91E2118AE5E36E5A5829F705AA1

Windows8.1-KB3109103-x64.msu

E72F10A63EBCA35733B131BFB03F8CD07575FA02

CFBC0D1FAC53F3BAE75F81FEC38D37EEC3B9BA9CD554EBD52D80F4B8FF2A9EB9

Windows6.1-KB3109103-ia64.msu

9AD27971ECC91570812D3E8A8ABEE596979E1AE7

16EEC59D13AD7F1F684512E76BF895B55665BA1991387295552A79D53BB19647

Windows6.0-KB3109103-x86.msu

193C96E23CD6939C822D0F51DDC1B5D3A369821E

1A9E735FF072BFECF3BC4CAB05CF2DD2BA5DFCFA61150D6AC501F91109EBBFBF

Windows6.1-KB3109103-x64.msu

5A443C08AC3F02AE8A7EC1100F306F8CF0D216DB

3CBDE3DF10F70BCBE686F8B3943B4031D4A18D9715C99786DF5C7F746781D8BB


The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Windows 8 and Windows Server 2012 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.17xxx

    Windows 8, Windows RT, or Windows Server 2012

    RTM

    GDR

    6.2.920 0.21xxx

    Windows 8, Windows RT, or Windows Server 2012

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.2.9200.17565

147,968

05-Nov-2015

09:55

x64

Wshrm.dll

6.2.9200.16384

17,408

26-Jul-2012

03:08

x64

Rmcast.sys

6.2.9200.21683

147,968

05-Nov-2015

09:40

x64

Wshrm.dll

6.2.9200.16384

17,408

26-Jul-2012

03:08

x64

Wshrm.dll

6.2.9200.16384

15,360

26-Jul-2012

03:20

x86

Wshrm.dll

6.2.9200.16384

15,360

26-Jul-2012

03:20

x86

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.2.9200.17565

123,392

05-Nov-2015

09:57

x86

Wshrm.dll

6.2.9200.16384

15,360

26-Jul-2012

03:20

x86

Rmcast.sys

6.2.9200.21683

123,392

05-Nov-2015

10:11

x86

Wshrm.dll

6.2.9200.16384

15,360

26-Jul-2012

03:20

x86

Windows 8.1 and Windows Server 2012 R2 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.17 xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.3.9600.18119

121,856

05-Nov-2015

08:21

x86

Wshrm.dll

6.3.9600.17415

14,848

29-Oct-2014

01:58

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.3.9600.18119

145,408

05-Nov-2015

08:59

x64

Wshrm.dll

6.3.9600.17415

17,920

29-Oct-2014

02:42

x64

Wshrm.dll

6.3.9600.17415

14,848

29-Oct-2014

01:58

x86

Windows 7 and Windows Server 2008 R2 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760 1.18xxx

    Windows 7 or Windows Server 2008 R2

    SP1

    GDR

    6.1.760 1.23 xxx

    Windows 7 or Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.1.7601.19055

117,760

05-Nov-2015

09:48

x86

Wshrm.dll

6.1.7601.19055

14,848

05-Nov-2015

19:02

x86

Rmcast.sys

6.1.7601.23260

117,760

05-Nov-2015

09:43

x86

Wshrm.dll

6.1.7601.23260

14,848

05-Nov-2015

19:06

x86

For all supported ia64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.1.7601.19055

371,200

05-Nov-2015

09:17

IA-64

Wshrm.dll

6.1.7601.19055

40,448

05-Nov-2015

19:07

IA-64

Rmcast.sys

6.1.7601.23260

371,200

05-Nov-2015

09:17

IA-64

Wshrm.dll

6.1.7601.23260

40,448

05-Nov-2015

23:22

IA-64

Wshrm.dll

6.1.7601.19055

14,848

05-Nov-2015

19:02

x86

Wshrm.dll

6.1.7601.23260

14,848

05-Nov-2015

19:06

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.1.7601.19055

146,944

05-Nov-2015

09:53

x64

Wshrm.dll

6.1.7601.19055

17,408

05-Nov-2015

19:05

x64

Rmcast.sys

6.1.7601.23260

146,944

05-Nov-2015

10:00

x64

Wshrm.dll

6.1.7601.23260

17,408

05-Nov-2015

23:25

x64

Wshrm.dll

6.1.7601.19055

14,848

05-Nov-2015

19:02

x86

Wshrm.dll

6.1.7601.23260

14,848

05-Nov-2015

19:06

x86

Windows Vista and Windows Server 2008 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.0.600 2.19xxx

    Windows Vista or Windows Server 2008

    SP2

    GDR

    6.0.600 2.23xxx

    Windows Vista or Windows Server 2008

    SP2

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported ia64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.0.6002.19534

365,568

05-Nov-2015

07:45

IA-64

Wshrm.dll

6.0.6001.18000

40,448

19-Jan-2008

08:29

IA-64

Rmcast.sys

6.0.6002.23844

365,568

05-Nov-2015

07:20

IA-64

Wshrm.dll

6.0.6002.23844

40,448

05-Nov-2015

07:51

IA-64

Wshrm.dll

6.0.6002.19534

14,848

05-Nov-2015

09:07

x86

Wshrm.dll

6.0.6002.23844

14,848

05-Nov-2015

08:20

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.0.6002.19534

140,800

05-Nov-2015

07:54

x64

Wshrm.dll

6.0.6002.19534

17,408

05-Nov-2015

08:55

x64

Rmcast.sys

6.0.6002.23844

140,800

05-Nov-2015

07:34

x64

Wshrm.dll

6.0.6002.23844

17,408

05-Nov-2015

08:14

x64

Wshrm.dll

6.0.6002.19534

14,848

05-Nov-2015

09:07

x86

Wshrm.dll

6.0.6002.23844

14,848

05-Nov-2015

08:20

x86

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Rmcast.sys

6.0.6002.19534

113,664

05-Nov-2015

07:34

x86

Wshrm.dll

6.0.6000.16386

14,848

02-Nov-2006

09:46

x86

Rmcast.sys

6.0.6002.23844

113,664

05-Nov-2015

07:10

x86

Wshrm.dll

6.0.6002.23844

14,848

05-Nov-2015

08:20

x86


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