vuln-ubuntu/data/osv/cve/2021/UBUNTU-CVE-2021-40656.json

{
  "schema_version": "1.7.0",
  "id": "UBUNTU-CVE-2021-40656",
  "details": "libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867.",
  "aliases": [],
  "upstream": [
    "CVE-2021-40656"
  ],
  "related": [],
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
    },
    {
      "type": "Ubuntu",
      "score": "medium"
    }
  ],
  "published": "2022-04-08T16:15:00Z",
  "modified": "2026-10-17T09:08:35Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.5.2-2?arch=source&distro=xenial"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.4.2-1",
        "1.5.2-2"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.5.2-2"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.5.2-2"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.7.3-1?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.5.2-2",
        "1.7.3-1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.7.3-1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.7.3-1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.7.3-1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.8.2-2.1?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.8.2-1",
        "1.8.2-2.1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.8.2-2.1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.8.2-2.1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.8.2-2.1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.3-3?arch=source&distro=jammy"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.8.6-2",
        "1.10.3-2",
        "1.10.3-3"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.3-3build1?arch=source&distro=noble"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.10.3-3",
        "1.10.3-3build1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3build1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3build1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3build1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.5-1?arch=source&distro=questing"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.10.5-1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1:1.8.7-r2-1?arch=source&distro=stonking"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.10.5-1build1",
        "1:1.8.7-r2-1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1:1.8.7-r2-1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1:1.8.7-r2-1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.5-1build1?arch=source&distro=resolute"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.10.5-1",
        "1.10.5-1build1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1build1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1build1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1build1"
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-40656"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libsixel/libsixel/issues/25"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-40656"
    }
  ]
}