Denial of Service Vulnerability in Xen 4.2 and Earlier Hypercalls

CVE-2012-5515 · MEDIUM Severity

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

The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.

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