Cross' new deal comes a day after the Seahawks wrapped up the No. 1 seed in the NFC after defeating the San Francisco 49ers on Saturday.
The 25-year-old was selected ninth overall by the Seahawks in the 2022 NFL Draft and has played in at least 14 games every season since.
Cross allowed 24 quarterback pressures, four quarterback hits, and two sacks in 450 pass blocking snaps at left tackle this season.