The OneLine32 function in io-ico.c in gdk-pixbuf before 2.35.3 allows remote attackers to cause a denial of service (out-of-bounds write and crash) via crafted dimensions in an ICO file.
https://lists.debian.org/debian-lts-announce/2019/12/msg00025.html
https://git.gnome.org/browse/gdk-pixbuf/tree/NEWS?id=640134c46221689d263369872937192e4484c83b
http://www.ubuntu.com/usn/USN-3085-1
http://www.openwall.com/lists/oss-security/2016/07/26/11
http://lists.opensuse.org/opensuse-updates/2016-09/msg00040.html