Abu Ahmad bin Adi al-Jurjani: It is said that Kadir had companionship [with the Prophet], and he is one of the companions from whom no one narrated except Abu Ishaq al-Sabi'i
Abu Hatim al-Razi: His place is truthfulness
Abu Hatim bin Hibban al-Busti: He narrates mursal hadiths, and he is rejected in narration, so I do not like relying on what he narrated alone
Abu Nuaym al-Asbahani: He confirmed his companionship
Ahmad bin Hanbal: He did not have companionship [with the Prophet]
Ahmad bin Shuayb al-Nasa'i: Weak
Ibrahim bin Yaqub al-Jawzajani: Deviating
Ibn Abd al-Barr al-Andalusi: His hadith, according to most scholars, is mursal
Al-Dhahabi: He is mistaken who considers him a companion, and he was among the extremist Shiites
Simak bin Salmah: He weakened him
Muhammad bin Ismail al-Bukhari: He is not strong