Multiple integer overflows in the (1) sycc422_to_rgb and (2) sycc444_to_rgb functions in fxcodec/codec/fx_codec_jpx_opj.cpp in PDFium, as used in Google Chrome before 48.0.2564.82, allow remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a crafted PDF document.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.