Help with a dump fuzzer to crash applications and hijack control flow of two simple c app

I have implement a dump fuzzer to crash some targeted apps. those apps should crash with a simple dump fuzzer. However, I was able only to crash a few of them. I wrote the dump fuzzer with Python, but I need someone how know assembly and software security as I am also trying to hijack the control flow of two c simple app.

This may take half an hour or less if you are familiar with assembly, fuzzers, and software security as I have done most of the work.