Its almost always because something like this happened. Someone found a hole in the system they could use for unauthorized purposes, so they are patching it.
They frame it as "vulnerabilities" as if hackers are going to do something evil with it, but its often just something that allows people more power/access to the OS involved. Same problem with most Windows updates really.
I never understood the point of "updating" your household appliances
Like why do you need to update the fridge?
Its almost always because something like this happened. Someone found a hole in the system they could use for unauthorized purposes, so they are patching it.
They frame it as "vulnerabilities" as if hackers are going to do something evil with it, but its often just something that allows people more power/access to the OS involved. Same problem with most Windows updates really.