Certain page table manipulation operations in Xen 4.1.x, 4.2.x, and
earlier are not preemptible, which allows local PV kernels to cause a
denial of service via vectors related to "deep page table traversal."
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] 20130502 Xen Security Advisory 45 (CVE-2013-1918) - Several long latency operations are not preemptible
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