Cracks in stucco are a common problem.

Use acrylic latex paint to cover hairline and small cracks, or fill them with latex caulking compound and then paint with acrylic latex paint. For wider cracks, apply an all-purpose filler such as premixed bridging and patching compound, according to label directions. For deep holes, build up the patch with several successive layers, allowing each to dry before applying the next. Do your best to match the texture by touching it up with a float or a small brush.