It's the second Tuesday of October, which means it's time for another one of Microsoft's Patch Tuesdays. Along with updates for every supported version of Windows 10, Microsoft has released updates for users on Windows 8.1 and WIndows 7 SP1.
As usual, there are two versions of each update, a monthly rollup, and a security-only update. For Windows 8.1, the monthly rollup is KB4520005, which can be downloaded manually here. The security-only update is KB4519990 and it can be downloaded manually from here. It comes with a relatively small changelog:
- Security updates to Windows Cryptography, Windows Authentication, Windows Kernel, Windows Storage and Filesystems, Microsoft JET Database Engine, Internet Information Services, the Microsoft Scripting Engine, and Windows Server.
For the security-only update, only the second bullet point applies. Both updates have the same known issue:
|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:
- Addresses an issue that may fail to disable VBScript in Internet Explorer by default after installing KB4507437 (Preview of Monthly Rollup) or KB4511872 (Internet Explorer Cumulative Update) and later.
- Security updates to Windows Authentication, Microsoft JET Database Engine, Windows Kernel, Internet Information Services, the Microsoft Scripting Engine, and Windows Server.
- 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.
- Security updates to Windows Authentication, Microsoft JET Database Engine, Windows Kernel, Internet Information Services, and Windows Server.
Neither of the Windows 7 updates has any known issues.
The monthly rollup updates for either version will show up automatically through Windows Update automatically, but if you want the security-only updates, you'll need to download it manually.