USN-8025-1: .NET vulnerability

Publication date

11 February 2026

Overview

.NET could be made to bypass security features.


Packages

  • dotnet10 - .NET CLI tools and runtime
  • dotnet8 - .NET CLI tools and runtime
  • dotnet9 - .NET CLI tools and runtime

Details

Kevin Jones discovered that the System.Security.Cryptography.Cose component
in .NET did not properly handle certain missing special elements in input
data. An attacker could possibly use this issue to bypass security checks
and gain unauthorized access or perform data manipulation.

Kevin Jones discovered that the System.Security.Cryptography.Cose component
in .NET did not properly handle certain missing special elements in input
data. An attacker could possibly use this issue to bypass security checks
and gain unauthorized access or perform data manipulation.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

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


Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


Have additional questions?

Talk to a member of the team ›