We have a crash caused by memory writes in the kernel. What part of this doesn't suggest kernel mode exploitation via a cleverly-crafted font that can be embedd

We have a crash caused by memory writes in the kernel. What part of this doesn't suggest kernel mode exploitation via a cleverly-crafted font that can be embedded into a web page or PDF? Font bugs should result in errors, not BSODs. Untrusted code on a VM is easy to secure: make the VM do nothing more then draw some glyphs, and check every access!