ubuntu-cve-2016-9382
Vulnerability from osv_ubuntu
Published
2017-01-23 21:59
Modified
2026-04-22 07:38
Summary
Details

Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.

Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxen-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "libxen-ocaml",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "libxenstore3.0",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.1-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.3-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.3-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.4-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.4-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-hypervisor-4.4-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-system-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-system-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-system-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-utils-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xen-utils-common",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          },
          {
            "binary_name": "xenstore-utils",
            "binary_version": "4.4.2-0ubuntu0.14.04.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "xen",
        "purl": "pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.9?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.2-0ubuntu0.14.04.9"
            }
          ],
          "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",
        "4.4.2-0ubuntu0.14.04.3",
        "4.4.2-0ubuntu0.14.04.4",
        "4.4.2-0ubuntu0.14.04.5",
        "4.4.2-0ubuntu0.14.04.6",
        "4.4.2-0ubuntu0.14.04.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxen-4.6",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "libxenstore3.0",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.4-amd64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.4-arm64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.4-armhf",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.5-amd64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.5-arm64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.5-armhf",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.6-amd64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.6-arm64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-hypervisor-4.6-armhf",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-system-amd64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-system-arm64",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-system-armhf",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-utils-4.6",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xen-utils-common",
            "binary_version": "4.6.0-1ubuntu4.3"
          },
          {
            "binary_name": "xenstore-utils",
            "binary_version": "4.6.0-1ubuntu4.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "xen",
        "purl": "pkg:deb/ubuntu/xen@4.6.0-1ubuntu4.3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6.0-1ubuntu4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.5.1-0ubuntu1",
        "4.5.1-0ubuntu2",
        "4.6.0-1ubuntu1",
        "4.6.0-1ubuntu2",
        "4.6.0-1ubuntu4",
        "4.6.0-1ubuntu4.1",
        "4.6.0-1ubuntu4.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.",
  "id": "UBUNTU-CVE-2016-9382",
  "modified": "2026-04-22T07:38:04Z",
  "published": "2017-01-23T21:59:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-9382"
    },
    {
      "type": "REPORT",
      "url": "https://xenbits.xen.org/xsa/advisory-192.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-9382"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-9382"
  ]
}



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