freetype: FT_Bitmap_New integer overflow, FreeType TT_Vary_Get_Glyph_Deltas improper input validation

FreeType 2 before 2.4.7, as used in CoreGraphics in Apple iOS before 5, Mandriva Enterprise Server 5, and possibly other products, allows remote attackers to execute arbitrary code or cause a denial of service memory corruption via a crafted font, a different vulnerability than CVE-2011-0226...