Windows 10 · 2016 · Release · Out-of-band update

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

What's in this update

It addresses 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”.

From Microsoft's release notes for KB5020439.

Microsoft's known issues — KB5020439

  • Issue Known issue On October 5, 2022, the Jordanian government made an official announcement ending the winter-time Daylight Saving Time (DST) time zone change. Starting at 12:00 a.m. Friday, October 28, 2022, the official time will not advance by an hour and will permanently shift to the UTC + 3 time zone. The impact of this change is as follows: Clocks will not be advanced by an hour at 12:00 a.m. on October 28, 2022 for the Jordan time zone. The Jordan time zone will permanently shift to the UTC + 3 time zone. Symptoms if no update is installed and the workaround is not used on devices in the Jordan time zone on October 28, 2022 or later: Time shown in Windows and apps will not be correct. Apps and cloud s Workaround: This issue is addressed in KB5019964 .

Microsoft's release notes for KB5020439 ›

Known issues — reported on the forum

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Discussed on the forum

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