FreeType 2 before 2017-03-07 has an out-of-bounds write related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.
https://www.oracle.com/security-alerts/cpuapr2020.html
https://security.gentoo.org/glsa/201706-14
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=738