The (1) t1parsefontmatrix function in type1/t1load.c, (2) cidparsefontmatrix function in cid/cidload.c, (3) t42parsefontmatrix function in type42/t42parse.c, and (4) psparserloadfield function in psaux/psobjs.c in FreeType before 2.5.4 do not check return values, which allows remote attackers to cause a denial of service (uninitialized memory access and application crash) or possibly have unspecified other impact via a crafted font.