The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall
in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or
administrators to cause a denial of service (host crash) and possibly
gain privileges via a crafted grant reference that triggers a write to
an arbitrary hypervisor memory location.
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] 20120905 Xen Security Advisory 18 (CVE-2012-3516) - grant table entry swaps have inadequate bounds checking
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