There is a heap-based buffer over-read in the Image::printIFDStructure function in image.cpp in Exiv2 0.26. A Crafted input will lead to a remote denial of service attack. Bug report (with reproducer): https://bugzilla.redhat.com/show_bug.cgi?id=1470729
Created exiv2 tracking bugs for this issue: Affects: fedora-all [bug 1474340]