Are all the hadiths in Sahih al-Bukhari authentic?

Sahih al-Bukhari is the most authentic book after the Holy Quran. Muslim scholars have unanimously agreed upon its authenticity and the necessity of acting upon its contents. Although some criticisms have been leveled against a small number of its hadiths, these criticisms do not affect the overall authenticity of the book. Al-Hafiz Ibn Hajar has elaborated on answering these criticisms, explaining that they are very few, relate to minor issues, and do not undermine the authenticity of the narrated texts. He mentioned that the criticized hadiths fall into six categories, and only a rare few of them affect the core of the book.