Heap-based buffer overflow in the opj_j2k_update_image_data function in OpenJpeg 2016.1.18 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted JPEG 2000 image.
https://www.oracle.com/security-alerts/cpujul2020.html
https://security.gentoo.org/glsa/201612-26