An off-by-one error was discovered in opj_tcd_code_block_enc_allocate_data in lib/openjp2/tcd.c in OpenJPEG 2.2.0. The vulnerability causes an out-of-bounds write, which may lead to remote denial of service (heap-based buffer overflow affecting opj_mqc_flush in lib/openjp2/mqc.c and opj_t1_encode_cblk in lib/openjp2/t1.c) or possibly remote code execution.
https://github.com/uclouvain/openjpeg/issues/982
https://github.com/uclouvain/openjpeg/commit/afb308b9ccbe129608c9205cf3bb39bbefad90b9
https://blogs.gentoo.org/ago/2017/08/16/openjpeg-heap-based-buffer-overflow-in-opj_mqc_flush-mqc-c/