Su-25UTG attack aircraft
The carrier based Su-25UTG is not an attack aircraft... it is a training aircraft used to train pilots to land fixed wing aircraft on carriers.
The strike capability of the Kuznetsov consists of 12 Granit missiles in vertical silos in the deck.
The future strike capability of the Kuznetsov will include the Mig-29K2 and perhaps eventually the PAK FA-K naval variant unless they use the new light 5th gen fighter as a basis for a naval fighter instead.
i wonder why russia hasnt started any program for the replacement of old Tu-142 and Il-38
The Tu-142 will likely be replaced with a mix of HALE and PAK DA, while Il-38 will either be replaced by the A-42 or modification of the Tu-214 or similar aircraft... the former offers the ability to land on water, while the latter would be cheaper to buy and operate.