libfreerdp/codec/region.c in FreeRDP through 1.1.x and 2.x through 2.0.0-rc4 has memory leaks because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value.
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00005.html
https://github.com/FreeRDP/FreeRDP/commit/9fee4ae076b1ec97b97efb79ece08d1dab4df29a
https://github.com/FreeRDP/FreeRDP/issues/5645