MS16-045: Description of the security update for Windows Hyper-V: April 12, 2016

Summary

This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an authenticated attacker on a guest operating system runs a specially crafted application that causes the Hyper-V host operating system to execute arbitrary code. Customers who have not enabled the Hyper-V role are not affected.



To learn more about the vulnerability, see Microsoft Security Bulletin MS16-045.

More Information

Important

  • All future security and non-security 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 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 MS16-045 that corresponds to the version of Windows that you are running.

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-KB3135456-x64.msu

E2B995AF13446EF231B87151679BC34B67DCF319

014336433AC1E1947E57273370E75A2CAA49F16B15C73738DBF34E0B911996F6

Windows8.1-KB3135456-x64.msu

A42C42CCAE2E3DD54C0A7722FE7AECDAE2E69785

1683E20BA0682BCD397350ECE175007CA9D7CC85D76643AE0EA6614764287919


The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

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

Vmsif.dll

6.2.9200.16384

46,080

26-Jul-2012

03:07

x64

Vmsntfy.dll

6.2.9200.16384

89,088

26-Jul-2012

03:07

x64

Vmswitch.sys

6.2.9200.21793

567,296

03-Mar-2016

19:28

x64

Vmsif.dll

6.2.9200.16384

46,080

26-Jul-2012

03:07

x64

Vmsntfy.dll

6.2.9200.16384

89,088

26-Jul-2012

03:07

x64

Vmswitch.sys

6.2.9200.21793

567,296

03-Mar-2016

19:28

x64

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 x64-based versions

File name

File version

File size

Date

Time

Platform

Vmsif.dll

6.3.9600.18258

65,024

03-Mar-2016

16:45

x64

Vmsnetsetupplugin.dll

6.3.9600.17396

33,792

08-Oct-2014

06:07

x64

Vmswitch.sys

6.3.9600.18258

689,152

03-Mar-2016

18:24

x64

Vmsif.dll

6.3.9600.18258

65,024

03-Mar-2016

16:45

x64

Vmsntfy.dll

6.3.9600.17396

91,648

08-Oct-2014

06:54

x64

Vmswitch.sys

6.3.9600.18258

689,152

03-Mar-2016

18:24

x64

Vmsif.dll

6.3.9600.18258

65,024

03-Mar-2016

16:45

x64

Vmsntfy.dll

6.3.9600.17396

91,648

08-Oct-2014

06:54

x64

Vmswitch.sys

6.3.9600.18258

689,152

03-Mar-2016

18:24

x64

Vmsif.dll

6.3.9600.18258

65,024

03-Mar-2016

16:45

x64

Vmsntfy.dll

6.3.9600.17396

91,648

08-Oct-2014

06:54

x64

Vmswitch.sys

6.3.9600.18258

689,152

03-Mar-2016

18:24

x64


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