There are two situations in which durian is cracked but its flesh is hard. One is immature, and the other is a stiff fruit. If durian is not ripe, you can put the pulp in a clean fresh-keeping bag and then put it in a warm and ventilated place indoors to let it mature naturally. If it has become a stiff fruit, it has no edible value and needs to be thrown away.
When buying durian, we can judge whether durian is mature or not by looking at its appearance, hardness and smell. The ripe durian shell is golden yellow, and the two adjacent thorns on the shell can be pinched, which has a strong durian fragrance.
The above is about what to do if durian is cracked but the pulp is hard. I hope it helps you.