Francis J. Maguire, 20, of Burke was arrested after the incident and charged with malicious wounding, police said.
Emergency responders were called to the dormitory about 9:45 p.m., and when they arrived they found the victim lying in the hallway. Witnesses told them Maguire and the victim, who both lived in the dorm, got into an argument. Maguire allegedly tried to punch the victim and missed, which is when the victim punched Maguire, breaking his nose, police said.
Maguire then allegedly pulled out a pocket knife and stabbed the victim, according to police.
Investigators also said they found narcotics on Maguire and plan to charge him with additional counts. He remains in custody at the Arlington jail.