The CInArchive::ReadFileItem method in Archive/Udf/UdfIn.cpp in 7zip 9.20 and 15.05 beta and p7zip allows remote attackers to cause a denial of service (out-of-bounds read) or execute arbitrary code via the PartitionRef field in the Long Allocation Descriptor in a UDF file.
https://usn.ubuntu.com/3913-1/
https://security.gentoo.org/glsa/201701-27
http://www.securitytracker.com/id/1035876
http://www.securityfocus.com/bid/90531
http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html
http://www.debian.org/security/2016/dsa-3599
http://lists.opensuse.org/opensuse-updates/2016-07/msg00069.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00098.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00004.html