Black Cats boss David Moyes said the club were waiting to see whether the 28-year-old required surgery on the injury, but would definitely have to bring in another keeper.
He said: "Vito has torn ligaments in his elbow and we're waiting to see whether it will require surgery
A minimum of three months.
"We definitely need to look for another goalkeeper because we only have a young keeper after Jordan Pickford."
Sunderland, and their new manager, are still searching for their first points of the season after 2-1 defeats to Manchester City and Middlesbrough in their opening two games
They did beat Shrewsbury in the League Cup in midweek
Source : PA
Source: PA