1. Ubuntu Security Notices
  2. USN-8215-1

USN-8215-1: .NET vulnerability

Publication date

28 April 2026

Overview

.NET could be made to crash or run programs as an administrator.

Releases

Packages

Details

It was discovered that the Microsoft.AspNetCore.DataProtection library in
.NET did not properly verify cryptographic signatures under certain
conditions. A remote attacker could possibly use this issue to elevate
privileges.

It was discovered that the Microsoft.AspNetCore.DataProtection library in
.NET did not properly verify cryptographic signatures under certain
conditions. A remote attacker could possibly use this issue to elevate
privileges.

Update instructions

After a standard system update, it is recommended to rotate the DataProtection key ring.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.10 questing aspnetcore-runtime-10.0 –  10.0.7-0ubuntu1~25.10.1
dotnet-host-10.0 –  10.0.7-0ubuntu1~25.10.1
dotnet-hostfxr-10.0 –  10.0.7-0ubuntu1~25.10.1
dotnet-runtime-10.0 –  10.0.7-0ubuntu1~25.10.1
dotnet-sdk-10.0 –  10.0.107-0ubuntu1~25.10.1
dotnet-sdk-aot-10.0 –  10.0.107-0ubuntu1~25.10.1
dotnet10 –  10.0.107-10.0.7-0ubuntu1~25.10.1
24.04 LTS noble aspnetcore-runtime-10.0 –  10.0.7-0ubuntu1~24.04.1
dotnet-host-10.0 –  10.0.7-0ubuntu1~24.04.1
dotnet-hostfxr-10.0 –  10.0.7-0ubuntu1~24.04.1
dotnet-runtime-10.0 –  10.0.7-0ubuntu1~24.04.1
dotnet-sdk-10.0 –  10.0.107-0ubuntu1~24.04.1
dotnet-sdk-aot-10.0 –  10.0.107-0ubuntu1~24.04.1
dotnet10 –  10.0.107-10.0.7-0ubuntu1~24.04.1

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References

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