According to Sky Sports, the Saints are willing to sell the player this summer and he is a target for Liverpool and Aston Villa.
Southampton want to trim their wage bill and the 29-year-old is not a key player for them anymore.
The newly-promoted side have been linked with other keepers such as Jack Butland and Tom Heaton in the recent weeks.
It seems that Dean Smith wants to add an experienced shot-stopper to his side. McCarthy has shown that he is good enough at the Premier League level and he could prove to be a decent addition to Villa.