Raiders LB Nick Usher also reverted to the injured reserve list after clearing waivers.
Aruna, 26, was drafted by the Vikings in the sixth round out of Tulane in 2018. He signed a four-year, $2.6 million deal, but spent the entire season on injured reserve.
Minnesota waived Aruna with an injury designation during final roster cuts at the end of the preseason and he later reverted to their injured reserve list. The Vikings waived him a few weeks after with a settlement and he eventually signed on with the Raiders last year.
Las Vegas waived Aruna last month before re-signing him a few weeks ago.
During his four-year college career, Aruna recorded 107 total tackles, 11 sacks, three forced fumbles, three recoveries and four pass defenses in 37 games.