Jpeg2000

How heap buffer overflow happens in C++ JPEG2000 decoding and how to fix it

A critical heap buffer overflow vulnerability was discovered in the OpenJPEG wrapper for Android (jp2forandroid). The `opj_read_from_byte_array()` function performed memcpy operations without validating that the source offset hadn't exceeded the buffer length, allowing maliciously crafted JPEG2000 images to trigger arbitrary code execution. A simple bounds check before the copy operation now prevents this exploitation path.