An out-of-bounds read vulnerability was found in OpenJPEG 2.1.2, in the j2k_to_image tool. Converting a specially crafted JPEG2000 file to another format could cause the application to crash or, potentially, disclose some data from the heap.
https://www.debian.org/security/2017/dsa-3768
https://security.gentoo.org/glsa/201710-26
https://github.com/szukw000/openjpeg/commit/7b28bd2b723df6be09fe7791eba33147c1c47d0d