Hanafi
The sources give no view for it here.
الاستعاذة في صلاة الجنازة
هل يختلف حكم الاستعاذة في صلاة الجنازة عن حكمها في الصلاة المطلقة؟
Each school’s answer
Hanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
حُكْمُهَا، وَمَحَلُّهَا فِي صَلاَةِ الْجِنَازَةِ: ٢٨ - لاَ يَخْتَلِفُ حُكْمُ الاِسْتِعَاذَةِ فِي الْجِنَازَةِ عَنْ حُكْمِهَا فِي الصَّلاَةِ الْمُطْلَقَةِ، وَيَجْرِي فِيهَا الْخِلاَفُ الَّذِي جَرَى فِي الصَّلاَةِ الْمُطْلَقَةِ. (٥)
«الموسوعة الفقهية الكويتية» (Kuwait) entry «استعاذة» vol. 4 p. 15
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What bears this mark is in our words, our standard wording; the books’ texts stay as they are.