I don't understand what's the complaint here. I'm not familiar with Mint, but if Mint is using upstream versions of Linux kernel, Firefox and Xorg, I can see th

I don't understand what's the complaint here. I'm not familiar with Mint, but if Mint is using upstream versions of Linux kernel, Firefox and Xorg, I can see that only as a good thing, since I have more trust in upstream core developers of these packages then in Ubuntu or any other distributions "hardening". Just remember the Debian OpenSSH security fiasco where Debian "fixed" the security flaw in upstream OpenSSH and made all its users vulnerable.