The ICU Project's ICU4C library, before 55.1, contains a heap-based buffer overflow in the resolveImplicitLevels function of ubidi.c (CVE-2014-8146).
The ICU Project's ICU4C library, before 55.1, contains an integer overflow in the resolveImplicitLevels function of ubidi.c due to the assignment of an int32 value to an int16 type (CVE-2014-8147).
The ucnviogetConverterName function in common/ucnv_io.cpp in International Components for Unicode (ICU) mishandles converter names with initial x- substrings, which allows remote attackers to cause a denial of service (read of uninitialized memory) or possibly have unspecified other impact via a crafted file (CVE-2015-1270).