The spritefont reader can be induced to perform a 32-bit overflow multiply that could in theory result in a RCE.

This impacts the use of the DirectX Tool Kit SpriteFont class file loading ctor if given untrusted data files.

This bug has been fixed in the May 7, 2026 release. Alternatively, users can update their copy of the reader as per this commit.

This does not apply if a project's .spritefont files are all 'trusted' data that were included with an application. It's primarily an issue only if developers are using user-provided or network downloaded spritefont files.