“The Church does not normally encourage cremation. The family of the deceased must decide whether the body should be cremated, taking into account any laws governing burial or cremation. In some countries, the law requires cremation.
Where possible, the body of a deceased member who has been endowed should be dressed in temple clothing when it is cremated. A funeral service may be held (see 18.6).”
They don’t encourage it but certainly leave open the possibility of doing it. As hard as I try I can’t find a doctrinal reason why it’s a problem.The odds are good that by the time the resurrection comes around, my body is going to be dust one way or another.