The vbd_create function in Xen 3.1.2, when the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 is used, allows guest OS users to cause a denial of service (host OS panic) via an attempted access to a virtual CD-ROM device through the blkback driver. NOTE: some of these details are obtained from third party information.
bugs.centos.org/bug_view_advanced_page.php?bug_id=4517
secunia.com/advisories/42884
secunia.com/advisories/46397
www.redhat.com/support/errata/RHSA-2011-0017.html
www.securityfocus.com/archive/1/520102/100/0/threaded
www.securityfocus.com/bid/45795
www.vmware.com/security/advisories/VMSA-2011-0012.html
bugzilla.redhat.com/show_bug.cgi?id=655623
exchange.xforce.ibmcloud.com/vulnerabilities/64698