{
  "document": {
    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "* SECURITY UPDATE: double free in the Python SAX attributeDecl callback\n     - debian/patches/CVE-2026-74860.patch: drop the extra Py_DECREF() on\n       each enumeration value string in pythonAttributeDecl(), since\n       PyList_SetItem() already steals that reference, so a DTD with an\n       enumerated attribute no longer frees the strings twice\n     - CVE-2026-74860\n   * debian/rules: run the C regression programs (runtest, testapi,\n     testrecurse, testcatalog, testchar, testdict) and the Python binding\n     tests in the arch build; skip only the cases whose data the +dfsg\n     tarball does not ship (runxmlconf, runtest's threads group, reader5.py)",
        "title": "Details"
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
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    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790709344",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790709344"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/advisories/2026/clsa-2026_1790709344.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-09-29T19:16:38Z",
      "generator": {
        "date": "2026-09-29T19:16:38Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1790709344",
      "initial_release_date": "2026-09-29T19:16:38Z",
      "revision_history": [
        {
          "date": "2026-09-29T19:16:38Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-74860"
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          "category": "description",
          "text": "A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.",
          "title": "Vulnerability description"
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