4.38.23171 is available for the following devices.
- Kobo Touch A/B
- Kobo Touch C
- Kobo Mini
- Kobo Glo
- Kobo Glo HD
- Kobo Touch 2.0
- Kobo Aura
- Kobo Aura HD
- Kobo Aura H2O
- Kobo Aura H2O Edition 2 v1
- Kobo Aura H2O Edition 2 v2
- Kobo Aura ONE
- Kobo Aura ONE Limited Edition
- Kobo Aura Edition 2 v1
- Kobo Aura Edition 2 v2
- Kobo Nia
- Kobo Clara HD
- Kobo Forma
- Kobo Libra H2O
- Kobo Elipsa
- Kobo Sage
- Kobo Libra 2
- Kobo Clara 2E
- Kobo Elipsa 2E
4.41.23145 is available for
- Kobo Libra Colour
- Kobo Clara BW
- Kobo Clara Colour
See
https://pgaskin.net/KoboStuff/kobofirmware.html for all download links.