August 2021 .NET Updates

The following .NET updates were released in August 2021. This issue will be updated if there are any additional releases during the month.

.NET

* [.NET August 2021 Updates – 5.0.9, 3.1.17 and 2.1.29 ](https://devblogs.microsoft.com/dotnet/net-august-2021/)
* .NET 5.0.9 and .NET SDK 5.0.400, .NET SDK 5.0.302 and .NET SDK 5.0.205 ([Release Notes](https://github.com/dotnet/core/blob/main/release-notes/5.0/5.0.9/5.0.9.md) | [Download](https://dotnet.microsoft.com/download/dotnet/5.0))
* .NET Core 3.1.18 and .NET SDK 3.1.412 and NET SDK 3.1.118 ([Release Notes](https://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.18/3.1.18.md) | [Download](https://dotnet.microsoft.com/download/dotnet-core/3.1))
* .NET Core 2.1.30 and .NET SDK 2.1.526 and NET SDK 2.1.818 ([Release Notes](https://github.com/dotnet/core/blob/main/release-notes/2.1/2.1.30/2.1.30.md) | [Download](https://dotnet.microsoft.com/download/dotnet-core/3.1))

**Update**
The .NET Core 2.1.29 August update did not include the correct fix for [CVE-2021-34532](https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-34532).
To resolve this, we are re-releasing the August security update for .NET Core 2.1 as 2.1.30. If you have installed .NET Core 2.1.29 previously you need to install the .NET Core 2.1.30 update in order to be fully protected.

_Note: .NET Core 3.1 and .NET 5.0 August updates are not affected and therefore not being re-released._

.NET Framework

* [August 2021 Security and Quality Rollup](https://devblogs.microsoft.com/dotnet/net-framework-august-2021-security-and-quality-rollup/)

.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)

Review the August 2021 release links and version details in this issue, starting with the linked .NET release notes and download pages. Done means the announcement accurately reflects any additional August releases and corrected version information.

Written by the indexing model from the issue text.