ibacm before 1.0.6 does not properly manage reference counts for multicast connections, which allows remote attackers to cause a denial of service (ibacm service crash) via a crafted join response.
https://exchange.xforce.ibmcloud.com/vulnerabilities/79396
https://bugzilla.redhat.com/show_bug.cgi?id=865492
http://www.securityfocus.com/bid/55890
http://www.openwall.com/lists/oss-security/2012/10/11/9
http://www.openwall.com/lists/oss-security/2012/10/11/6