Carnell has three years of eligibility remaining.
Brookins was with the Cyclones for one season, but preserved his redshirt and did not see any game action.
Ebel becomes the third Iowa State linebacker to transfer to Penn State.
Jarod Crespo's hat trick earned a split for the Nittany Lions to start the second half of their season.
Woseley played in every game for Penn State in 2025.
Buhr logged over 1,000 snaps at left guard in his time with the Cyclones.