Denial of Service Vulnerability in Xen's p2m_pod_emergency_sweep Function

CVE-2015-7970 · MEDIUM Severity

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

The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand.

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