The calcstepsizes function in jpc_dec.c in JasPer 1.900.22 allows remote attackers to cause a denial of service (assertion failure) via unspecified vectors.
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00082.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00085.html
https://blogs.gentoo.org/ago/2016/11/16/jasper-multiple-assertion-failure