ClamAV before 0.98.6 allows remote attackers to have unspecified impact via a crafted upack packer file, related to a "heap out of bounds condition."
https://security.gentoo.org/glsa/201512-08
http://www.ubuntu.com/usn/USN-2488-2
http://www.securityfocus.com/bid/72372
http://securitytracker.com/id/1031672
http://secunia.com/advisories/62757
http://secunia.com/advisories/62536
http://lists.opensuse.org/opensuse-updates/2015-05/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00014.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-January/148958.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-January/148950.html
http://blog.clamav.net/2015/01/clamav-0986-has-been-released.html