From gbhackers.com
Recently, security researchers have discovered a very distinct software bug that is marked as a very critical software bug, as it turns an airplane in the wrong way.
Nav Canada firstly identified this bug in 2017 on a Bombardier CRJ-200, which makes the aircraft to switch to the wrong way, in short, this bug turns the airplane to right instead of left if pilots regulate the pre-set height limit.
Soon after the incident, it was reported to the appropriate authority, and the other reason for this software bug is that the pilots used the FMS’s temperature compensation function in a remarkably cold climate.