Insufficient Type Counts in Xen Grant-Table Feature (XSA-224 Bug 2)

CVE-2017-10921 · HIGH Severity

AV:N/AC:L/AU:N/C:C/I:C/A:C

The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2.

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