Side mirror glass is loose (housing is OK)

My car is an ‘08 Hyundai sante Fe and the side mirror itself is loose. I don’t believe it’s likely to fall out however. I had to take it on the highway and it started to come further out on the bottom but luckily stayed on. Messed with it a bit when I got home (I know, probably not a good idea) and it got stuck a little bit more but it’s pointing too far in and up now.

The first two attachments are when it was looser, and then the second two are it stuck.

In terms of bad, worse, and worst: is this a simple fix, will I need to replace the mirror and it’s attachment or does the whole side mirror have to go?