ubuntu-cve-2018-7858
Vulnerability from osv_ubuntu
Published
2018-03-12 00:00
Modified
2025-09-08 16:44
Summary
Details

Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.11+dfsg-1ubuntu7.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:2.11+dfsg-1ubuntu7.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:2.11+dfsg-1ubuntu7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:2.10+dfsg-0ubuntu3",
        "1:2.10+dfsg-0ubuntu4",
        "1:2.10+dfsg-0ubuntu5",
        "1:2.11+dfsg-1ubuntu1",
        "1:2.11+dfsg-1ubuntu2",
        "1:2.11+dfsg-1ubuntu4",
        "1:2.11+dfsg-1ubuntu5",
        "1:2.11+dfsg-1ubuntu6",
        "1:2.11+dfsg-1ubuntu7"
      ]
    }
  ],
  "aliases": [],
  "details": "Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.",
  "id": "UBUNTU-CVE-2018-7858",
  "modified": "2025-09-08T16:44:48Z",
  "published": "2018-03-12T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-7858"
    },
    {
      "type": "REPORT",
      "url": "https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3649-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-7858"
    }
  ],
  "related": [
    "USN-3649-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-7858"
  ]
}



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