What you are missing is a cvl+ and wab+ in the F2 progeny, I would assume this combination is lethal as well as the double recombinant. To find the distance between the genes then you need to determine the parentals from the F1 progeny and find which had the least amount of crossover so they the first and third. I assumed the females from the F1 were 1/2 wab because they were (ver+,cvl-,wab+/ver-,cvl+,wab-) I couldn't assume x-linked because of the amount of F1 progeny with wab, too high for a single cross over event. So I assumed it was autosomal.
