The vulnerability of the GNTTABOP_map_grant component in Xen hypervisors allows a perpetrator to trigger a service failure.

The vulnerability of the GNTTABOPmapgrant component in Xen hypervisors is related to errors in returned values. Exploiting this vulnerability can allow an attacker to cause a service failure...

UBUNTU-CVE-2015-4163

GNTTABOPswapgrantref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service NULL pointer dereference via a hypercall without a GNTTABOPsetuptable or GNTTABOPsetversion...