ubuntu-cve-2026-57053
Vulnerability from osv_ubuntu
Published
2026-06-23 18:18
Modified
2026-07-09 19:37
Summary
Details

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.28-1ubuntu2.2"
          },
          {
            "binary_name": "libidn11",
            "binary_version": "1.28-1ubuntu2.2"
          },
          {
            "binary_name": "libidn11-java",
            "binary_version": "1.28-1ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.28-1ubuntu2.2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.28-1ubuntu1",
        "1.28-1ubuntu2",
        "1.28-1ubuntu2.1",
        "1.28-1ubuntu2.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.32-3ubuntu1.2"
          },
          {
            "binary_name": "libidn11",
            "binary_version": "1.32-3ubuntu1.2"
          },
          {
            "binary_name": "libidn11-java",
            "binary_version": "1.32-3ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.32-3ubuntu1.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.28-1ubuntu2",
        "1.32-3ubuntu1",
        "1.32-3ubuntu1.1",
        "1.32-3ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.33-2.1ubuntu1.2"
          },
          {
            "binary_name": "libidn11",
            "binary_version": "1.33-2.1ubuntu1.2"
          },
          {
            "binary_name": "libidn11-java",
            "binary_version": "1.33-2.1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.33-2.1ubuntu1.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.33-2",
        "1.33-2.1",
        "1.33-2.1ubuntu1",
        "1.33-2.1ubuntu1.1",
        "1.33-2.1ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.33-2.2ubuntu2"
          },
          {
            "binary_name": "libidn11",
            "binary_version": "1.33-2.2ubuntu2"
          },
          {
            "binary_name": "libidn11-java",
            "binary_version": "1.33-2.2ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.33-2.2ubuntu2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.33-2.2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.38-4ubuntu1.1"
          },
          {
            "binary_name": "libidn12",
            "binary_version": "1.38-4ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.38-4ubuntu1.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.38-4ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.33-3",
        "1.33-3build1",
        "1.38-4",
        "1.38-4build1",
        "1.38-4ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.42-1ubuntu0.1"
          },
          {
            "binary_name": "libidn12",
            "binary_version": "1.42-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.42-1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.42-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.41-1",
        "1.42-1",
        "1.42-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.43-2"
          },
          {
            "binary_name": "libidn12",
            "binary_version": "1.43-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.43-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.43-1",
        "1.43-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idn",
            "binary_version": "1.43-2ubuntu0.26.04.1"
          },
          {
            "binary_name": "libidn12",
            "binary_version": "1.43-2ubuntu0.26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libidn",
        "purl": "pkg:deb/ubuntu/libidn@1.43-2ubuntu0.26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.43-2ubuntu0.26.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.43-2",
        "1.43-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "GNU libidn before 1.44 is prone to out-of-bounds reads of\u00a0uninitialized memory in the ToUnicode APIs because of mishandling in\u00a0idna_to_unicode_internal. The affected code is not present in libidn2.",
  "id": "UBUNTU-CVE-2026-57053",
  "modified": "2026-07-09T19:37:21Z",
  "published": "2026-06-23T18:18:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-57053"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-57053"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8521-1"
    }
  ],
  "related": [
    "USN-8521-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-57053"
  ]
}



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