The reasons behind the decision will be announced later, says Cas's spokesperson to AFP.
Pogba tested positive for testosterone in August 2023, after a match with his club team Juventus.
In February, the Italian anti-doping organization announced that the Frenchman would be suspended for four years.
I have never consciously used doping substances. I am sorry, shocked, and devastated that everything I have built up in my professional player career has been taken away from me, said Pogba then.
The player's representatives claimed that the testosterone came from a dietary supplement prescribed by an American doctor to the midfielder.
Now, Cas has shortened the sentence to 18 months, effective from September 11, 2023.
Pogba will thus be available for play from March 11, 2025.
"After Cas's decision, I can look forward to the day when I can follow my dreams again. Thanks again for all the love and support. I really miss being back on the pitch", says the 2018 World Champion.
The 31-year-old has a contract with Juventus until 2026.