Here it comes, first occurence: one of my VM's BSOD-ed on me yesterday.
To be completely fair, I did have experienced an occurrence of something similar twice in last moths: after wake up from sleep, the screen was collection of the color pixels, completely unreadable. After reboot, everything was normal.
I found out that the issue may be related to the "safesleep" mode. For now, I disabled the mode by
sudo pmset -a hibernatemode 0
To re-enable SafeSleep, the command is:
sudo pmset -a hibernatemode 3
So far, everything works - but I am still investigating. Thanks to this thread (in German) for the hint.