Mailing the story:
Debian alert: New man-db packages fix segmentation fault
A previous man-db update (DSA-364-1) fixed buffer overruns in ult_src, a
part of the "mandb" command that finds the canonical source file for
each man page. However, this update introduced an error in the routine
that resolves hardlinks: depending on the filenames of hardlinked man
pages, that routine might itself overrun allocated memory, causing a
segmentation fault.