Curiously, ufraw-batch seems to actually create the requested JPG file just fine. It seg-faults immediately after, though. I suspect that this may have something to do with the lens that I used being fully-manual: I had to go into the camera settings and enable operation "without a lens attached." Note that --lensfun=none had no effect on the seg fault.
ben@anteater:~$ ufraw-batch --version
ufraw-batch 0.22
EXIV2 enabled.
JPEG enabled.
JPEG2000 (libjasper) disabled.
TIFF enabled.
PNG enabled.
FITS disabled.
ZIP enabled.
BZIP2 enabled.
LENSFUN enabled.
ben@anteater:/media/ben/User File Storage/Pictures/Cora-Second-Christmas$ ufraw-batch DSC03626.ARW --out-type=jpg --out-path=jpg/
ufraw-batch: Loaded DSC03626.ARW
ufraw-batch: overwrite 'jpg/DSC03626.jpg'? [y/N] y
ufraw-batch: Saved /media/ben/User File Storage/Pictures/Cora-Second-Christmas/jpg/DSC03626.jpg
Segmentation fault (core dumped)