DiarioSport says Barca are considering moving for the Spain international as they seek cover for No1 Victor Valdes after Alberto Jorquera suffered a knee injury last week.
Canizares has already played more than five Liga games for Valencia this season, which would normally prevent him from joining a Primera rival. However, a legal challenge is set to be made as the veteran has been effectively dismissed by Valencia with no hope of again playing for the club this season.