graphicsmagick:xenial is vulnerable to use-after-free. The ReadWMFImage function in coders/wmf.c has a use-after-free issue for data associated with exception reporting.
hg.code.sf.net/p/graphicsmagick/code/rev/be898b7c97bd
blogs.gentoo.org/ago/2017/08/05/graphicsmagick-use-after-free-in-readwmfimage-wmf-c/
lists.debian.org/debian-lts-announce/2018/08/msg00002.html
lists.fedoraproject.org/archives/list/[email protected]/message/PF62B5PJA2JDUOCKJGUQO3SPL74BEYSV/
lists.fedoraproject.org/archives/list/[email protected]/message/WHIKB4TP6KBJWT2UIPWL5MWMG5QXKGEJ/
www.debian.org/security/2018/dsa-4321