{"id":"UBUNTU-CVE-2015-7970","details":"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.","modified":"2025-09-08T16:43:29Z","published":"2015-10-30T15:59:00Z","upstream":["CVE-2015-7970"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-7970"},{"type":"REPORT","url":"http://xenbits.xen.org/xsa/advisory-150.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-7970"}],"affected":[{"package":{"name":"xen","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.3?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.2-0ubuntu0.14.04.3"}]}],"versions":["4.3.0-1ubuntu1","4.3.0-1ubuntu2","4.3.0-1ubuntu3","4.3.0-1ubuntu4","4.3.0-1ubuntu5","4.4.0-0ubuntu3","4.4.0-0ubuntu4","4.4.0-0ubuntu5","4.4.0-0ubuntu5.1","4.4.0-0ubuntu5.2","4.4.1-0ubuntu0.14.04.1","4.4.1-0ubuntu0.14.04.2","4.4.1-0ubuntu0.14.04.3","4.4.1-0ubuntu0.14.04.4","4.4.1-0ubuntu0.14.04.5","4.4.1-0ubuntu0.14.04.6","4.4.2-0ubuntu0.14.04.1","4.4.2-0ubuntu0.14.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"libxen-4.4","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"libxen-dev","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"libxen-ocaml","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"libxen-ocaml-dev","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"libxenstore3.0","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.1-amd64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.3-amd64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.3-armhf","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.4-amd64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.4-arm64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-hypervisor-4.4-armhf","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-system-amd64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-system-arm64","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-system-armhf","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-utils-4.4","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xen-utils-common","binary_version":"4.4.2-0ubuntu0.14.04.3"},{"binary_name":"xenstore-utils","binary_version":"4.4.2-0ubuntu0.14.04.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-7970.json"}}],"schema_version":"1.7.3","severity":[{"type":"Ubuntu","score":"medium"}]}