kernel is vulnerable to denial of service (DoS). The vulnerability exists as a missing check was found in the hypervisor_callback() function in the Linux kernel provided by the kernel-xen package. This could cause a denial of service of a 32-bit guest if an application running in that guest accesses a certain memory location in the kernel.
lists.xensource.com/archives/html/xen-devel/2009-05/msg00561.html
secunia.com/advisories/35093
secunia.com/advisories/35298
www.debian.org/security/2009/dsa-1809
www.openwall.com/lists/oss-security/2009/05/14/2
www.redhat.com/security/updates/classification/#important
www.securityfocus.com/bid/34957
access.redhat.com/errata/RHSA-2009:1106
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10313