Exiv2 0.26 has a heap-based buffer overflow in getData in preview.cpp.

References

• advisory https://lists.debian.org/debian-lts-announce/2018/06/msg00010.html
• advisory https://security.gentoo.org/glsa/201811-14
• advisory https://usn.ubuntu.com/3700-1/
• advisory https://www.debian.org/security/2018/dsa-4238
• report https://github.com/Exiv2/exiv2/issues/283