Multiple integer overflows in the opj_tcd_init_tile function in tcd.c in OpenJPEG, as used in PDFium in Google Chrome before 53.0.2785.89 on Windows and OS X and before 53.0.2785.92 on Linux, allow remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted JPEG 2000 data. An integer overflow, leading to a heap buffer overflow, was found in openjpeg, also affecting the PDF viewer in Chromium. A specially crafted JPEG2000 image could cause incorrect calculations when allocating various data structures, which could lead to a crash, or potentially, code execution.
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– Scott Cheney, Manager of Information Security, Sierra View Medical Center