November 12, 2019—KB4525253 (Security-only update)


None ## Improvements and fixes This security update includes quality improvements. Key changes include: * Provides protections against the Intel® Processor Machine Check Error vulnerability (_[CVE-2018-12207](<https://portal.msrc.microsoft.com/security-guidance/advisory/CVE-2018-12207>)_). Use the registry setting as described in the Guidance KB article_. _(This registry setting is disabled by default.) * Provides protections against the Intel® Transactional Synchronization Extensions (Intel® TSX) Transaction Asynchronous Abort vulnerability ([CVE-2019-11135](<https://portal.msrc.microsoft.com/security-guidance/advisory/CVE-2019-11135>)). Use the registry settings as described in the Windows Server article_. _(These registry settings are disabled by default for Windows Server OS editions.) * Security updates to the Microsoft Graphics Component, Windows Input and Composition, Windows Cryptography, Windows Virtualization, Windows Kernel, Windows Datacenter Networking, and the Microsoft JET Database Engine. For more information about the resolved security vulnerabilities, please refer to the [Security Update Guide](<https://portal.msrc.microsoft.com/security-guidance>). ## Known issues in this update **Symptom**| **Workaround** ---|--- Certain operations, such as **rename**, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.| Do one of the following: * Perform the operation from a process that has administrator privilege. * Perform the operation from a node that doesn’t have CSV ownership. Microsoft is working on a resolution and will provide an update in an upcoming release. ## How to get this update **Before installing this update**Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest Rollup. SSUs improve the reliability of the update process to mitigate potential issues while installing the Rollup and applying Microsoft security fixes. If you are using Windows Update, the latest SSU (KB4523208) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the [Microsoft Update Catalog](<http://www.catalog.update.microsoft.com/home.aspx>). **Install this update****Release Channel**| **Available**| **Next Step** ---|---|--- Windows Update and Microsoft Update| No| See the other options below. Microsoft Update Catalog| Yes| To get the standalone package for this update, go to the [Microsoft Update Catalog](<http://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4525253>) website. Windows Server Update Services (WSUS)| Yes| This update will automatically synchronize with WSUS if you configure **Products and Classifications** as follows:**Product**: Windows Server 2012, Windows Embedded 8 Standard**Classification**: Security Updates **File information**For a list of the files that are provided in this update, download the [file information for update 4525253](<https://download.microsoft.com/download/0/7/5/07517aec-5363-4786-9531-1d043a69ebd9/4525253.csv>).