In OpenJPEG 2.3.0, a stack-based buffer overflow was discovered in the pgxtovolume function in jp3d/convert.c. The vulnerability causes an out-of-bounds write, which may lead to remote denial of service or possibly remote code execution.
https://www.debian.org/security/2019/dsa-4405
https://usn.ubuntu.com/4109-1/
https://lists.debian.org/debian-lts-announce/2018/11/msg00018.html