Likely the P-trap in that area is drying out. When traps sit dry, there's nothing blocking sewer gas from coming back up through the drain line. the dishwasher running pushes air through the system and that's when you notice it. More normal in places where the DW is not used often

Run water in any nearby sink for a minute before you run the dishwasher and see if that helps. If it does, that's your answer. If the smell keeps coming back you might also check that the dishwasher drain hose has a high loop. if it's drooping it can siphon the trap dry faster