Good evening,
There are many things Buddhism and Hinduism have in common, but the three main things Buddhism and Hinduism have in common is the existence of Karma, and that salvation comes from an individual's own actions, reincarnation into another being according to he deeds of a previous life, and desire or attachment is the cause of suffering in the world.
I hope this answer has satisfied your needs, and if you have anymore questions, feel free to ask. Have a good night!
