imagew-cmd.c:850:46 in libimageworsener.a in ImageWorsener 1.3.1 allows remote attackers to cause a denial of service (divide-by-zero error) via a crafted image, related to imagew-api.c.
https://github.com/jsummers/imageworsener/commit/dc49c807926b96e503bd7c0dec35119eecd6c6fe
https://blogs.gentoo.org/ago/2017/05/20/imageworsener-multiple-vulnerabilities/