CVE-2015-7970

Medium

Description

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.

SeverityMedium

CVSS4.9

Exploit probability38. percentile0.4%

ProductXen

PublishedOct 30, 2015

First seenOct 30, 2015

How to fix

Vendor advisories

security.gentoo.org/glsa/201604-03

Affected products

Product	Affected versions	Fixed in
xen xen	3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.4.4	—

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