Use-after-free vulnerability in oxide::qt::URLRequestDelegatedJob in oxide-qt in Ubuntu 15.04 and 14.04 LTS might allow remote attackers to execute arbitrary code.
http://www.ubuntu.com/usn/USN-2677-1
http://www.securityfocus.com/bid/76174
http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1329.html