October Patch Tuesday is out for Windows 10 version 1903 and older, here’s what’s new

Microsoft is releasing new Patch Tuesday updates for Windows 10 version 1903 and older today.

Windows 10 1903

The latest version of Windows 10 is getting the build 18362.418 (KB4517389) today, which brings the following fixes:

  • Addresses an issue in security bulletin CVE-2019-1318 that may cause client or server computers that don’t support Extended Master Secret (EMS) RFC 7627 to have increased connection latency and CPU utilization. This issue occurs while performing full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. EMS support has been available for all the supported versions of Windows since calendar year 2015 and is being incrementally enforced by the installation of the October 8, 2019 and later monthly updates.
  • Addresses an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Security updates to Windows Shell, Internet Explorer, Microsoft Edge, Windows App Platform and Frameworks, Windows Cryptography, Windows Authentication, Windows Storage and Filesystems, Windows Kernel, Microsoft Scripting Engine, and Windows Server.

Microsoft is currently not aware of any known issues with this update, but that doesn’t mean that this update is completely safe to install. Recent Windows updates had various impacting CPU usage, Windows Search, or the Start Menu, and we hope Microsoft improved its quality standards for this latest build.

Windows 10 1809

If you’re still running Windows 10 version 1809, the build 17763.806 (KB4519338) is now available with the following fixes:

  • Addresses an issue in the Keyboard Lockdown Subsystem that may not filter key input correctly.
  • Addresses an issue in security bulletin CVE-2019-1318 that may cause client or server computers that don’t support Extended Master Secret (EMS) RFC 7627 to have increased connection latency and CPU utilization. This issue occurs while performing full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. EMS support has been available for all the supported versions of Windows since calendar year 2015 and is being incrementally enforced by the installation of the October 8, 2019 and later monthly updates.
  • Addresses an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Security updates to Windows Shell, Internet Explorer, Microsoft Scripting Engine, Microsoft Edge, Windows App Platform and Frameworks, Windows Cryptography, Windows Authentication, Windows Kernel, and Windows Server.

Be aware that this new build still has some known issues related to the Windows Mixed Reality Portal and Asian Language packs, but nothing new compared to the previous patch for Windows 10 version 1809.

Windows 10 1803

In case you’re still running the version 1803 of the OS (which will go out of support for Home and Pro users next month), the build 17134.1069 (KB4520008) is now available for you with the following fixes:

  • Addresses an issue in the Keyboard Lockdown Subsystem that may not filter key input correctly.
  • Addresses an issue with the Bluetooth hardening updates, released August 13, 2019, that may cause a “0x133 DPC_WATCHDOG_VIOLATION” error.
  • Addresses an issue in security bulletin CVE-2019-1318 that may cause client or server computers that don’t support Extended Master Secret (EMS) RFC 7627 to have increased connection latency and CPU utilization. This issue occurs while performing full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. EMS support has been available for all the supported versions of Windows since calendar year 2015 and is being incrementally enforced by the installation of the October 8, 2019 and later monthly updates.
  • Addresses an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Security updates to Windows Shell, Internet Explorer, Microsoft Edge, Windows App Platform and Frameworks, Windows Cryptography, Windows Authentication, Windows Datacenter Networking , Windows Storage and Filesystems, Windows Kernel, Microsoft Scripting Engine, and Windows Server.

Microsoft also released Patch Tuesday updates for Windows 10 versions 1709, 1703, 1607, and 1507 today, but these are only available for users running the Enterprise and Education versions of Windows 10. We invite you to check the dedicated pages on Microsoft’s Support site to check what’s new in this update.

We expect Microsoft to start rolling out Windows 10 version 1909 soon, but the company is apparently not done testing this update with Insiders in the Slow and Release Preview ring. We’ll let you know as soon as we get more information about this minor update.

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