ubuntu-cve-2015-7970
Vulnerability from osv_ubuntu
Published
2015-10-30 15:59
Modified
2026-04-22 07:37
Summary
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.

Severity
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxen-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
          },
          {
            "binary_name": "libxen-ocaml",
            "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "xen",
        "purl": "pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.2-0ubuntu0.14.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2015-7970",
  "modified": "2026-04-22T07:37:50Z",
  "published": "2015-10-30T15:59:00Z",
  "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"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2015-7970"
  ]
}



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