The 20-year-old suffered a dislocated finger in the Champions League defeat at Barcelona on Tuesday night.
Wenger has revealed that he club plans to ask the Premier League for permission to bring in experienced cover for Manuel Almunia.
“We need now an experienced goalkeeper as cover for Almunia because Mannone is out for six weeks so we cannot call on him,” Wenger told Arsenal TV Online.
“Mannone is here at the training ground having treatment, but he cannot play for the next six weeks.
“We can call him back [from Hull], but he is not available.
“We have Wojciech out – in my opinion for six weeks. We have Fabianski out for the rest of the season. We absolutely need some cover in goal.”
