In types.cpp in Exiv2 0.26, a large size value may lead to a SIGABRT during an attempt at memory allocation for an Exiv2::Internal::PngChunk::zlibUncompress call.
https://access.redhat.com/errata/RHSA-2019:2101
https://github.com/Exiv2/exiv2/issues/302
https://lists.debian.org/debian-lts-announce/2018/06/msg00010.html
https://lists.debian.org/debian-lts-announce/2018/10/msg00012.html
https://security.gentoo.org/glsa/201811-14