Skip to content
Heist/ feed
Back to feed
Critical

Security advisory

Type: advisorySources: OSVCVE: CVE-2018-14600

An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2018-14600
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 08:42 UTC · Revision 1

Source evidence

CVE-2018-14600

core-osv · Original source

Published 24 Aug 2018, 19:29 UTC

An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.

osv:CVE-2018-14600
Complete source record
{
  "id": "4c957e3acb18ea0be47137a48b99d0910409ca0aa63cd929326c2105761c2608",
  "url": "https://osv.dev/vulnerability/CVE-2018-14600",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-14600",
    "summary": "An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.",
    "evidence": "osv:CVE-2018-14600",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-14600",
      "aliases": [
        "CVE-2018-14600"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mirror/libx11",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "42f4d7af9cf6d1dbfa575552e057328b054a20c9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:x.org:libx11:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "libX11-1.6.5",
            "libX11-1.6.4",
            "libX11-1.6.3",
            "libX11-1.6.2",
            "libX11-1.6.1",
            "libX11-1.6.0",
            "libX11-1.5.99.902",
            "libX11-1.5.99.901",
            "libX11-1.5.0",
            "libX11-1.4.99.902",
            "libX11-1.4.99.901",
            "libX11-1.4.99.1",
            "libX11-1.4.4",
            "libX11-1.4.3",
            "libX11-1.4.2",
            "libX11-1.4.1",
            "libX11-1.4.0",
            "libX11-1.3.99.903",
            "libX11-1.3.99.902",
            "libX11-1.3.99.901",
            "libX11-1.3.4",
            "libX11-1.3.3",
            "libX11-1.3.2",
            "libX11-1.3.1",
            "libX11-1.3",
            "libX11-1.2.99.901",
            "libX11-1.2.2",
            "libX11-1.2.1",
            "libX11-1.2",
            "libX11-1.1.99.2",
            "libX11-1.1.4",
            "libX11-1.1.3",
            "libX11-1.1.2",
            "XORG-6_99_99_904",
            "MODULAR_COPY",
            "XORG-6_99_99_903",
            "XORG-6_8_99_903",
            "XORG-6_99_99_902",
            "XORG-6_8_99_902",
            "XORG-6_99_99_901",
            "XORG-6_8_99_901",
            "XORG-6_99_99_900",
            "XORG-6_8_99_900",
            "XORG-6_8_99_15",
            "XORG-6_8_99_14",
            "XORG-6_8_99_13",
            "XORG-6_8_99_10",
            "XORG-6_8_99_9",
            "XORG-6_8_99_7",
            "XORG-6_8_99_6",
            "XORG-6_8_1",
            "XORG-6_7_99_903",
            "XORG-6_7_99_902",
            "XORG-6_7_99_2",
            "XORG-6_7_99_1",
            "XACE-SELINUX-MERGE",
            "XORG-MAIN"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-14600.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://gitlab.freedesktop.org/xorg/lib/libx11",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "42f4d7af9cf6d1dbfa575552e057328b054a20c9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:x.org:libx11:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "libX11-1.6.5",
            "libX11-1.6.4",
            "libX11-1.6.3",
            "libX11-1.6.2",
            "libX11-1.6.1",
            "libX11-1.6.0",
            "libX11-1.5.99.902",
            "libX11-1.5.99.901",
            "libX11-1.5.0",
            "libX11-1.4.99.902",
            "libX11-1.4.99.901",
            "libX11-1.4.99.1",
            "libX11-1.4.4",
            "libX11-1.4.3",
            "libX11-1.4.2",
            "libX11-1.4.1",
            "libX11-1.4.0",
            "libX11-1.3.99.903",
            "libX11-1.3.99.902",
            "libX11-1.3.99.901",
            "libX11-1.3.4",
            "libX11-1.3.3",
            "libX11-1.3.2",
            "libX11-1.3.1",
            "libX11-1.3",
            "libX11-1.2.99.901",
            "libX11-1.2.2",
            "libX11-1.2.1",
            "libX11-1.2",
            "libX11-1.1.99.2",
            "libX11-1.1.4",
            "libX11-1.1.3",
            "libX11-1.1.2",
            "XORG-6_99_99_904",
            "MODULAR_COPY",
            "XORG-6_99_99_903",
            "XORG-6_8_99_903",
            "XORG-6_99_99_902",
            "XORG-6_8_99_902",
            "XORG-6_99_99_901",
            "XORG-6_8_99_901",
            "XORG-6_99_99_900",
            "XORG-6_8_99_900",
            "XORG-6_8_99_15",
            "XORG-6_8_99_14",
            "XORG-6_8_99_13",
            "XORG-6_8_99_10",
            "XORG-6_8_99_9",
            "XORG-6_8_99_7",
            "XORG-6_8_99_6",
            "XORG-6_8_1",
            "XORG-6_7_99_903",
            "XORG-6_7_99_902",
            "XORG-6_7_99_2",
            "XORG-6_7_99_1",
            "XACE-SELINUX-MERGE",
            "XORG-MAIN"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-14600.json"
          }
        }
      ],
      "modified": "2026-10-24T10:49:37.859196598Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2019:2079",
        "https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html",
        "https://lists.x.org/archives/xorg-announce/2018-August/002916.html",
        "https://security.gentoo.org/glsa/201811-01",
        "https://usn.ubuntu.com/3758-1/",
        "https://usn.ubuntu.com/3758-2/",
        "https://bugzilla.suse.com/show_bug.cgi?id=1102068",
        "https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.04"
                  },
                  {
                    "last_affected": "12.04"
                  },
                  {
                    "introduced": "14.04"
                  },
                  {
                    "last_affected": "14.04"
                  },
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-14600",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441779,
  "published_at": "2018-08-24T19:29:01.567+00:00"
}