An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.
https://github.com/upx/upx/issues/314
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html