I wouldn't risk it although if it is in a vacuum pack as Galio brand often is then as it is a best before date rather than a use by it may be OK. Arborio isn't really that expensive at about £1 a pack so why not just throw it away and not take the risk? Hope this helps.
"Any fool can criticize, condemn and complain - and most fools do" Benjamin Franklin "Some cause happiness wherever they go - others whenever they go" Oscar Wilde