I'd like to get something clarified. What kind of exploit does someone need in order to run "userland homebrew"? Yeah, the one that doesn't involve loading roms. I have read everywhere that there's the same userland exploit of 4.5 unpatched in 6.3, but I don't know if this is enough to run this kind of homebrew.
The userland exploit is just a foot in the door, they need a kernelmode exploit on top of it for full access to the system, which can then be used to lock it back down