ubuntu-cve-2025-11679
Vulnerability from osv_ubuntu
Published
2025-10-20 14:15
Modified
2026-01-20 05:25
Summary
Details

Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.

Severity
5.9 (Medium)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "1.7.1-1"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "1.7.1-1"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "1.7.1-1"
          },
          {
            "binary_name": "libwebsockets7",
            "binary_version": "1.7.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@1.7.1-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.2-1",
        "1.6.0-3",
        "1.6.0-4",
        "1.6.0-5",
        "1.6.1-1",
        "1.7.0-1ubuntu1",
        "1.7.0-2",
        "1.7.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "2.0.3-3build1"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "2.0.3-3build1"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "2.0.3-3build1"
          },
          {
            "binary_name": "libwebsockets8",
            "binary_version": "2.0.3-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@2.0.3-3build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-3",
        "2.0.3-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "3.2.1-3"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "3.2.1-3"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "3.2.1-3"
          },
          {
            "binary_name": "libwebsockets15",
            "binary_version": "3.2.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@3.2.1-3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-3build1",
        "3.2.1-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "4.0.20-2ubuntu1"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.0.20-2ubuntu1"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.0.20-2ubuntu1"
          },
          {
            "binary_name": "libwebsockets16",
            "binary_version": "4.0.20-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@4.0.20-2ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.20-2",
        "4.0.20-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.3-1.1build3"
          },
          {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.3-1.1build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@4.3.3-1.1build3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.2-4",
        "4.3.3-1",
        "4.3.3-1.1build1",
        "4.3.3-1.1build2",
        "4.3.3-1.1build3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwebsockets-dev",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.5-1"
          },
          {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libwebsockets",
        "purl": "pkg:deb/ubuntu/libwebsockets@4.3.5-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.5-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.",
  "id": "UBUNTU-CVE-2025-11679",
  "modified": "2026-01-20T05:25:06Z",
  "published": "2025-10-20T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-11679"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-11679"
    },
    {
      "type": "REPORT",
      "url": "https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101"
    },
    {
      "type": "REPORT",
      "url": "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-11679"
  ],
  "withdrawn": "2026-02-12T05:22:01Z"
}



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