BUG GRUB : malformed file... press any key to continue...

There is a bug with Grub. Sometimes at boot there is a message “malformed file… press any key to continue…”
It’s a known bug and there is a fix since June 22 :

But still no update from Ubuntu or Netrunner.
Is it possible to update Grub in Netrunner to get ride of this annoying bug ?

Thank You.