ubuntu-cve-2018-15854
Vulnerability from osv_ubuntu
Published
2018-08-25 00:00
Modified
2026-04-22 07:38
Summary
Details

Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because geometry tokens were desupported incorrectly.

Severity
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": "libxkbcommon-x11-0",
            "binary_version": "0.4.1-0ubuntu1.1"
          },
          {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.4.1-0ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libxkbcommon",
        "purl": "pkg:deb/ubuntu/libxkbcommon@0.4.1-0ubuntu1.1?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.1-0ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.1-1",
        "0.3.1-2",
        "0.4.1-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxkbcommon-x11-0",
            "binary_version": "0.5.0-1ubuntu2.1"
          },
          {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.5.0-1ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libxkbcommon",
        "purl": "pkg:deb/ubuntu/libxkbcommon@0.5.0-1ubuntu2.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.0-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.0-1ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxkbcommon-x11-0",
            "binary_version": "0.8.0-1ubuntu0.1"
          },
          {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.8.0-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libxkbcommon",
        "purl": "pkg:deb/ubuntu/libxkbcommon@0.8.0-1ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.8.0-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7.1-2",
        "0.8.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because geometry tokens were desupported incorrectly.",
  "id": "UBUNTU-CVE-2018-15854",
  "modified": "2026-04-22T07:38:43Z",
  "published": "2018-08-25T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-15854"
    },
    {
      "type": "REPORT",
      "url": "https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3786-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3786-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-15854"
    }
  ],
  "related": [
    "USN-3786-1",
    "USN-3786-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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-2018-15854"
  ]
}



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