Red Hat Security Advisory 2019-0040-01 - .NET Core is a managed software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET Core that address security vulnerabilities are now available. The updated versions are .NET Core 2.1.5 and 2.2.1. Issues addressed include a denial of service vulnerability.

Source: Red Hat Security Advisory 2019-0040-01