MS16-123: Description of the security update for kernel-mode drivers: October 11, 2016

Summary

This security update resolves vulnerabilities in Microsoft Windows. The more severe of the vulnerabilities could allow elevation of privilege if an attacker logs on to an affected system and runs a specially crafted application that could exploit the vulnerabilities and take control of an affected system.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-123.

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Important

• 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.

Method 2: Microsoft Update Catalog

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

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Method 3: Microsoft Download Center

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 MS16-123 that corresponds to the version of Windows that you are running.

More Information

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How to obtain help and support for this security update

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

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File hash information

File name	SHA1 hash	SHA256 hash
Windows6.0-KB3183431-ia64.msu	FB5B5A5F57B02083CD3D765EEE4D04472C047544	1D773CA70A03738BF1F4AE73867514CD81F094002AA214FE1525A24AF839D679
Windows6.0-KB3183431-x86.msu	E7C78348DD1F8E9074266E58B7B603E34CFF57B4	A03BB8E82139BC397FEEF72C26B2154DF072D77F535358C8A1E996F4C7AC970E
Windows6.0-KB3183431-x64.msu	BF6FE91703FD4DA37648A3F3CBD574606E630C1A	90AE65C741E454F869DB92B8D5FE36F4B6E79E6F867C46B3783FB99633F23C65

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File information

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

Windows Vista and Windows Server 2008 file informationNotes

* 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 versionsFile name	File version	File size	Date	Time	Platform
Dfsc.sys	6.0.6002.19691	249,856	08-Sep-2016	14:21	IA-64
Dfsc.sys	6.0.6002.24016	249,856	08-Sep-2016	14:18	IA-64

For all supported x86-based versionsFile name	File version	File size	Date	Time	Platform
Dfsc.sys	6.0.6002.19691	79,360	08-Sep-2016	14:20	x86
Dfsc.sys	6.0.6002.24016	79,360	08-Sep-2016	14:18	x86
Mrxdav.sys	6.0.6002.19691	115,200	08-Sep-2016	14:20	x86
Mrxdav.sys	6.0.6002.24016	115,200	08-Sep-2016	14:18	x86

For all supported x64-based versionsFile name	File version	File size	Date	Time	Platform
Dfsc.sys	6.0.6002.19691	102,400	08-Sep-2016	14:39	x64
Dfsc.sys	6.0.6002.24016	102,400	08-Sep-2016	14:36	x64
Mrxdav.sys	6.0.6002.19691	139,776	08-Sep-2016	14:39	x64
Mrxdav.sys	6.0.6002.24016	139,776	08-Sep-2016	14:37	x64
Mrxdav.sys	6.0.6002.19691	115,200	08-Sep-2016	14:20	x86
Mrxdav.sys	6.0.6002.24016	115,200	08-Sep-2016	14:18	x86