Moyes has failed to bring in any new players since guiding Everton to fifth place last season and his squad was further depleted by the sale of Andrew Johnson to Fulham.
Chief executive Keith Wyness has resigned his position at the club and chairman Bill Kenwright - under fire from fans angry at the lack of progress in the transfer market - has reiterated he would welcome new investment to strengthen the club's financial firepower.
A deal for Smith could cost around £2m while 22-year-old Cameroon international Mbia has pleaded to be allowed to join Everton after claiming they had tabled a £6m bid.
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