Update .NET Core SDK

[cssatkmd]

Tool name

.NET Core SDK

Tool license

N/A

Add or update?

• Add
• Update

Desired version

9.0.9 (9.0.305)

Approximate size

No response

Brief description of tool

No response

URL for tool's homepage

https://dotnet.microsoft.com/en-us/download/dotnet

Provide a basic test case to validate the tool's functionality.

Platforms where you need the tool

• Azure DevOps
• GitHub Actions

Runner images where you need the tool

• Ubuntu 22.04
• Ubuntu 24.04
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Can this tool be installed during the build?

Tool installation time in runtime

No response

Are you willing to submit a PR?

No response

[akilesh-amaran]

Hi @cssatkmd , Thank you for bringing this issue to our attention. We will look into this issue and will update you after investigation.

[cssatkmd]

The images 2025/09/17 are still missing the critical security updates, so I'm interested in hearing if anything can be done to help?
In general this is an issue for us, that patches take a long time to get included.. Can you help?

[alexbal45]

The images 2025/09/17 are still missing the critical security updates, so I'm interested in hearing if anything can be done to help? In general this is an issue for us, that patches take a long time to get included.. Can you help?

Critical security updates of NET Core SDK or the Operating system ?

[cssatkmd]

It is the .NET Core SDK and hence the runtime, that is missing the critical updates.
Latest version of windows-2022 (which is windows-latest), version 20250907.29.1, does not have the updates.

Security fixes was issued September 9th: https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-september-2025-servicing-updates/

This issue was created 12th of September.

Critical fixes are unfortunately still not available..

[alexbal45]

It is the .NET Core SDK and hence the runtime, that is missing the critical updates. Latest version of windows-2022 (which is windows-latest), version 20250907.29.1, does not have the updates.

Windows image update is likely delayed to next week the image update was closed by the bot.