Jackson, a former Cleveland State standout, signed his first 10-day deal with the Cavs on Jan. 23 after the club lost guards Mo Williams and Delonte West in consecutive games with injuries. Jackson has played in four games.
Williams has missed six games with a sprained shoulder and West will miss his sixth game Tuesday night with a broken left ring finger. Williams was expected to be sidelined at least one month. There is no timetable for West to return.
The Cavs have won eight straight and lead the Eastern Conference by 5½ games.