https://phys.org/news/2018-06-mars-curiosity-labs-action.html

The rover drilled its last scheduled rock sample in October 2016.

On May 20, a technique called "feed extended drilling" allowed Curiosity to drill its first rock sample since October 2016; on May 31, an additional technique called "feed extended sample transfer" successfully trickled rock powder into the rover for processing by its mineralogy laboratory. Delivery to its chemistry laboratory will follow in the week ahead.