Windows 10 950 Published by

Microsoft has released KB5020439 (OS Build 14393.5429) Out-of-band for Windows 10, version 1607, all editions and Windows Server 2016, all editions.



October 18, 2022—KB5020439 (OS Build 14393.5429) Out-of-band

Highlights

  • We address an issue that might affect some types of Secure Sockets Layer (SSL) and Transport Layer Security (TLS) connections. These connections might have handshake failures. For developers, the affected connections are likely to receive one or more records followed by a partial record with a size of less than 5 bytes within a single input buffer. If the connection fails, your app will receive the error, “SEC_E_ILLEGAL_MESSAGE”.

Improvements

This non-security update includes quality improvements. Key changes include: 

  • We address an issue that might affect some types of Secure Sockets Layer (SSL) and Transport Layer Security (TLS) connections. These connections might have handshake failures. For developers, the affected connections are likely to receive one or more records followed by a partial record with a size of less than 5 bytes within a single input buffer. If the connection fails, your app will receive the error, “SEC_E_ILLEGAL_MESSAGE”.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.  

Known issues in this update

Microsoft is not currently aware of any issues with this update.

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 cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security updates. For general information about SSUs, see  Servicing stack updates and  Servicing Stack Updates (SSU): Frequently Asked Questions

If you are using Windows Update, the latest SSU ( KB5017396) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the  Microsoft Update Catalog 


October 18, 2022—KB5020439 (OS Build 14393.5429) Out-of-band