International Components for Unicode (ICU) for C/C++ before 2017-02-13 has an out-of-bounds write caused by a heap-based buffer overflow related to the utf8TextAccess function in common/utext.cpp and the utext_setNativeIndex* function.
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://security.gentoo.org/glsa/201710-03
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=213
http://www.securityfocus.com/bid/97672