I hope to post in the right forum, otherwise I apologize for this.
if a MMU exception is caused by a process which tries to access to other memory segment (out of its own address space) what the kernel does in this case ?
maybe kernel kills the "bad" process ?

I guess kernel will prompt a SEGMENT ERROR.

It could be true. e.g. in C if you make a mistake using the pointer you get
this kind of error but I'd like to know what happen to the process responsible for the exception.