Is the Hadith about taking the Name of Allah Most High when uncertain about meat, Sahih?

Yes, it is in Bukhari.

عَنْ عَائِشَةَ، قَالَتْ: قَالُوا: يَا رَسُولَ اللَّهِ، إِنَّ هَا هُنَا أَقْوَامًا حَدِيثٌ عَهْدُهُمْ بِشِرْكٍ، يَأْتُونَا بِلُحْمَانٍ لاَ نَدْرِي يَذْكُرُونَ اسْمَ اللَّهِ عَلَيْهَا أَمْ لاَ، قَالَ: اذْكُرُوا أَنْتُمُ اسْمَ اللَّهِ، وَكُلُوا

(Sayidah) Aishah  said, A group of people said, O Messenger of Allah ﷺ,  there are people who have recently embraced Islam and they bring us meat, we do not know whether they had mentioned Allah’s (Most High) Name while slaughtering the animals or not. The Prophet ﷺ said, ‘You mention Allah’s (Most High) Name and then eat.’ (Sahih al-Bukhari, 7398).

This Hadith is narrated in Sahih al-Bukhari and Sahih Muslim multiple times, there is no doubt regarding its authenticity. The scholars of Ahl al-Sunnah are agreed upon the authenticity of the Marfoo Hadith in these two collections.

جَمِيع مَا حكم مُسلم بِصِحَّتِهِ من هَذَا الْكتاب فَهُوَ مَقْطُوع بِصِحَّتِهِ وَالْعلم النظري حَاصِل بِصِحَّتِهِ فِي نفس الْأَمر وَهَكَذَا مَا حكم البُخَارِيّ بِصِحَّتِهِ فِي كِتَابه وَذَلِكَ لِأَن الْأمة تلقت ذَلِك بِالْقبُولِ سوى من لَا يعْتد بِخِلَافِهِ ووفاقه فِي الْإِجْمَاع (صيانة صحيح مسلم)

Everything that (Imam) Muslim considered to be Sahih of this book is undoubtedly Sahih, and it leads to contemplative certainty due to its authenticity. Likewise, everything that (Imam) al-Bukhari considered to be Sahih in his book (is Sahih), because the Ummah has accepted that reality (the authenticity of Bukhari and Muslim) with agreement. With the exception of a few, whose acceptance or disagreement does not affect the consensus. (Imam Ibn Salah, Siyanatu Sahih Muslim).

And Allah (Most High) Knows Best.

– Answered by Shaykh Noorud-deen (20.05.2021)

See also:

Are all Hadith in Bukhari and Muslim Sahih?

Can you simply take the name of Allah Most High to make Haraam meat Halal?

When a Muslim tells you meat is Halal, can you take their word for it?

See also (video):