The winger has extended his loan spell by two months.
He played 86 mins last night as Vale won 3-1 over Southend. It was Kennedy's 7th appearance for The Valliants.
Manager Rob Page (a former Bluebird) said: “We’re delighted that we have come to an agreement with Cardiff for the extension of Matty’s loan.
"He's done fantastically well since he joined us and has really added something new to the squad. The lad is really enjoying his football too which is very important.”
