Welcome, I always wanted to ask this, how you fix/patch a vulnerability by yourself? /maybe possible duplicate, but I have not find the same, or I search the wrong way.. (sorry) /
I know a bit how to test a web_app vulnerability,and I understand how to fix them. But let's say there's a vulnerable operation_system and I want to patch the vulnerabilities by myself and not by security updates from devs?
Or it's affect if the OS/App is open-source or closed-source? /my rights to solve the mistake in the source code../
Thank you for educational informations, we need to learn to learn something. :)