It was found that tools/tiffcp.c in libtiff 4.0.6 has an out-of-bounds write on tiled images with odd tile width versus image width Upstream patch: https://github.com/vadz/libtiff/commit/5ad9d8016fbb60109302d558f7edb2cb2a3bb8e3
Created libtiff tracking bugs for this issue: Affects: fedora-all [bug 1397781]
Created mingw-libtiff tracking bugs for this issue: Affects: fedora-all [bug 1397782] Affects: epel-7 [bug 1397783]
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 6 Via RHSA-2017:0225 https://rhn.redhat.com/errata/RHSA-2017-0225.html