The ProcessGpsInfo function of the gpsinfo.c file of jhead 3.00 may allow a remote attacker to cause a denial-of-service attack or unspecified other impact via a malicious JPEG file, because of inconsistency between float and double in a sprintf format string during TAG_GPS_ALT handling.
https://nimo-zhang.github.io/2018/09/07/bug-analysis-1/#more
https://lists.debian.org/debian-lts-announce/2019/12/msg00037.html