A bit OT - how do I work on developing the skill set necessary to find vulnerabilities like these? Should I take some particular courses, or some other “track” of sorts? At the moment, I have an undergraduate in Computer Sciences, and I’d say I’m a fairly OK programmer.
There is an excellent pre-packaged VM with levels of challenges that take you through the basics of exploitation to quite advanced levels called "Modern Binary Exploitation" [0]. I would highly recommend it.
You can also do the challenges using IDA/Ghidra instead of looking at the source for a proper challenge and I recommend doing this initially for each challenge.