usn-8022-1
Vulnerability from osv_ubuntu
Published
2026-02-10 15:26
Modified
2026-06-25 10:47
Summary
expat vulnerabilities
Details

It was discovered that Expat incorrectly handled memory when parsing certain XML files. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 25.10. (CVE-2025-59375)

It was discovered that Expat incorrectly handled the initialization of parsers for external entities. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-24515)

It was discovered that Expat incorrectly handled integer calculations when allocating memory for XML tags. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-25210)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.1.0-4ubuntu1.4+esm11"
          },
          {
            "binary_name": "lib64expat1",
            "binary_version": "2.1.0-4ubuntu1.4+esm11"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.1.0-4ubuntu1.4+esm11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.1.0-4ubuntu1.4+esm11?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0-4ubuntu1.4+esm11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.0-4",
        "2.1.0-4ubuntu1",
        "2.1.0-4ubuntu1.1",
        "2.1.0-4ubuntu1.2",
        "2.1.0-4ubuntu1.3",
        "2.1.0-4ubuntu1.4",
        "2.1.0-4ubuntu1.4+esm1",
        "2.1.0-4ubuntu1.4+esm2",
        "2.1.0-4ubuntu1.4+esm4",
        "2.1.0-4ubuntu1.4+esm6",
        "2.1.0-4ubuntu1.4+esm7",
        "2.1.0-4ubuntu1.4+esm8",
        "2.1.0-4ubuntu1.4+esm9",
        "2.1.0-4ubuntu1.4+esm10"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.1.0-7ubuntu0.16.04.5+esm11"
          },
          {
            "binary_name": "lib64expat1",
            "binary_version": "2.1.0-7ubuntu0.16.04.5+esm11"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.1.0-7ubuntu0.16.04.5+esm11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.1.0-7ubuntu0.16.04.5+esm11?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0-7ubuntu0.16.04.5+esm11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.0-7",
        "2.1.0-7ubuntu0.16.04.1",
        "2.1.0-7ubuntu0.16.04.2",
        "2.1.0-7ubuntu0.16.04.3",
        "2.1.0-7ubuntu0.16.04.4",
        "2.1.0-7ubuntu0.16.04.5",
        "2.1.0-7ubuntu0.16.04.5+esm2",
        "2.1.0-7ubuntu0.16.04.5+esm5",
        "2.1.0-7ubuntu0.16.04.5+esm6",
        "2.1.0-7ubuntu0.16.04.5+esm7",
        "2.1.0-7ubuntu0.16.04.5+esm8",
        "2.1.0-7ubuntu0.16.04.5+esm9",
        "2.1.0-7ubuntu0.16.04.5+esm10"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.2.5-3ubuntu0.9+esm3"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.2.5-3ubuntu0.9+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.2.5-3ubuntu0.9+esm3?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.5-3ubuntu0.9+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.3-1",
        "2.2.3-2",
        "2.2.5-0ubuntu2",
        "2.2.5-3",
        "2.2.5-3ubuntu0.1",
        "2.2.5-3ubuntu0.2",
        "2.2.5-3ubuntu0.4",
        "2.2.5-3ubuntu0.7",
        "2.2.5-3ubuntu0.8",
        "2.2.5-3ubuntu0.9",
        "2.2.5-3ubuntu0.9+esm1",
        "2.2.5-3ubuntu0.9+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.2.9-1ubuntu0.8+esm1"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.2.9-1ubuntu0.8+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.2.9-1ubuntu0.8+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.9-1ubuntu0.8+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.7-2",
        "2.2.9-1",
        "2.2.9-1build1",
        "2.2.9-1ubuntu0.2",
        "2.2.9-1ubuntu0.4",
        "2.2.9-1ubuntu0.5",
        "2.2.9-1ubuntu0.6",
        "2.2.9-1ubuntu0.7",
        "2.2.9-1ubuntu0.8"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.4.7-1ubuntu0.7"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.4.7-1ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.4.7-1ubuntu0.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.7-1ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.1-2",
        "2.4.1-3",
        "2.4.2-1",
        "2.4.3-1",
        "2.4.3-2",
        "2.4.4-1",
        "2.4.6-1",
        "2.4.7-1",
        "2.4.7-1ubuntu0.1",
        "2.4.7-1ubuntu0.2",
        "2.4.7-1ubuntu0.3",
        "2.4.7-1ubuntu0.4",
        "2.4.7-1ubuntu0.5",
        "2.4.7-1ubuntu0.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-59375",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-24515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-25210",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "expat",
            "binary_version": "2.7.1-2ubuntu0.2"
          },
          {
            "binary_name": "libexpat1",
            "binary_version": "2.7.1-2ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "expat",
        "purl": "pkg:deb/ubuntu/expat@2.7.1-2ubuntu0.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.1-2ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.1-1",
        "2.7.1-2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Expat incorrectly handled memory when parsing certain\nXML files. An attacker could possibly use this issue to cause a denial of\nservice. This issue was only addressed in Ubuntu 25.10. (CVE-2025-59375)\n\nIt was discovered that Expat incorrectly handled the initialization of parsers\nfor external entities. An attacker could possibly use this issue to cause a\ndenial of service. (CVE-2026-24515)\n\nIt was discovered that Expat incorrectly handled integer calculations when\nallocating memory for XML tags. An attacker could possibly use this issue to\ncause a denial of service or execute arbitrary code. (CVE-2026-25210)",
  "id": "USN-8022-1",
  "modified": "2026-06-25T10:47:03Z",
  "published": "2026-02-10T15:26:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8022-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-59375"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-24515"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-25210"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "expat vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-59375",
    "UBUNTU-CVE-2026-24515",
    "UBUNTU-CVE-2026-25210"
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.