The cvtClump function in the rgb2ycbcr tool in LibTIFF 4.0.6 and earlier allows remote attackers to cause a denial of service (out-of-bounds write) by setting the "-v" option to -1.
https://security.gentoo.org/glsa/201701-16
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-4650
http://www.securityfocus.com/bid/85956
http://www.openwall.com/lists/oss-security/2016/04/08/4