The vmx_set_uc_mode function in Xen 3.3 through 4.3, when disabling
chaches, allows local HVM guests with access to memory mapped I/O
regions to cause a denial of service (CPU consumption and possibly
hypervisor or guest kernel panic) via a crafted GFN range.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20130724 Xen Security Advisory 60 (CVE-2013-2212) - Excessive time to disable caching with HVM guests with PCI passthrough
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