The hash functionality in json-c before 0.12 allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted JSON data, involving collisions.
lists.fedoraproject.org/pipermail/package-announce/2014-April/131845.html
secunia.com/advisories/57791
www.mandriva.com/security/advisories?name=MDVSA-2014:079
www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
www.securityfocus.com/bid/66715
bugzilla.redhat.com/show_bug.cgi?id=1032311
exchange.xforce.ibmcloud.com/vulnerabilities/92541
github.com/json-c/json-c/commit/64e36901a0614bf64a19bc3396469c66dcd0b015