The Supreme Court has determined that the definition of a crime of violence contained in 18 USC 16(b) is unconstitutionally vague. In so doing, it relied heavily on its 2015 decision in Johnson v. United States, which invalidated the residual clause of the Armed Career Criminal Act on vagueness grounds.
The full text of Sessions v. Dimaya can be found here:
https://www.supremecourt.gov/opinions/17pdf/15-1498_1b8e.pdf