October 2020 .NET Updates

The following .NET updates were released on October 2020. This issue will be updated if there are any additional releases during the month.

.NET Core

* [October 2020 Updates – 2.1.23 and 3.1.9](https://devblogs.microsoft.com/dotnet/net-core-october-2020/)
* .NET Core 3.1.9 and .NET Core SDK 3.1.109 ([Release Notes](https://github.com/dotnet/core/blob/master/release-notes/3.1/3.1.9/3.1.9.md) | [Download](https://www.microsoft.com/net/download/dotnet-core/3.1))
* .NET Core 2.1.23 and .NET Core SDK 2.1.811 ([Release Notes](https://github.com/dotnet/core/blob/master/release-notes/2.1/2.1.23/2.1.23.md) | [Download](https://www.microsoft.com/net/download/dotnet-core/2.1))
* .[NET Core support for Ubuntu 20.10](https://github.com/dotnet/core/issues/5017)
* .[NET Core Support for Fedora 33](https://github.com/dotnet/core/issues/5018)

.NET Framework

* [October 2020 Security and Quality Rollup Updates](https://devblogs.microsoft.com/dotnet/net-framework-october-2020-security-and-quality-rollup-updates/)
* [Republishing of July 2020 Security Only Updates](https://devblogs.microsoft.com/dotnet/net-framework-republishing-of-july-2020-security-only-updates/)
* [October 2020 Cumulative Update Preview Update](https://devblogs.microsoft.com/dotnet/net-framework-october-2020-cumulative-update-preview-update/)
* [October 2020 Cumulative Update Preview Update for Windows 10 2004 and Windows Server, version 2004](https://devblogs.microsoft.com/dotnet/net-framework-october-2020-cumulative-update-preview-update-for-windows-10-2004-and-windows-server-version-2004/)

.NET Support Policies

Microsoft support policies are defined in the following documents:

* [Microsoft .NET Support Policy](https://dotnet.microsoft.com/platform/support/policy/)
* [.NET Core OS Lifecycle Policy](https://github.com/dotnet/core/blob/master/os-lifecycle-policy.md)