Is selling a device without mentioning a defect in it, despite knowing about the defect and needing the money, considered haraam and does it necessitate expiation?

The seller must disclose any defects in the item being sold to the buyer, based on Al-Kharashi's statement: "It is incumbent upon every seller, whether in a profit-sharing sale (murabaha) or otherwise, to disclose any aspects of the purchased commodity that the buyer dislikes and that would diminish his desire to purchase it." If he fails to do so, he must repent. The sale itself is considered valid by the majority of scholars, but the seller must inform the buyer of the defect. If the buyer forgives him, then so be it. Otherwise, the buyer has the option to either return the item or receive compensation for the defect, which is the proportion of the difference between the value of the item in its sound condition and its value with the defect. If the seller is unable to reach the buyer, he should give the compensation for the defect in charity on the buyer's behalf.