None of these vulnerabilities are "theoretical" (they're maybe a bit stale, is the worst you could say about them).
A reasonable first approximation would be that all writeups about new vulnerabilities are intended to drum up something, so that's just about the least interesting thing you could say about a post like this.
I have seen all of these vulnerabilities in widely-deployed products of varying sorts (this was my day job for many years). I don't know who these authors are, I'm just saying that the bugs aren't theoretical.
