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    "aggregate_severity": {
      "text": "Critical"
    },
    "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: use-after-free in the DTD parser reachable through\n     xmlParseInternalSubset()\n     - debian/patches/CVE-2026-6653.patch: stop xmlPushInput() in parser.c\n       from returning -1 when the parser has already been halted, since\n       inputPush() has by then installed the input as ctxt->input and the\n       caller reads -1 as \"ownership not transferred\" and frees it.\n       xmlParsePEReference() then leaves ctxt->input dangling and\n       xmlParseInternalSubset()'s loop reads through it in RAW, which is\n       evaluated before the XML_PARSER_EOF test can short-circuit.  The halt\n       itself comes from the amplification check in xmlParserEntityCheck()\n       added by Patch-for-security-issue-CVE-2021-3541.patch and is left\n       untouched\n     - CVE-2026-6653\n   * SECURITY UPDATE: stack buffer overflows in xmlcatalog --shell mode\n     - debian/patches/CVE-2026-11979.patch: add capacity checks to the\n       command, argument and argv loops of the usershell() command-line\n       parser in xmlcatalog.c, so an over-long --shell command line is\n       rejected instead of written past the end of the on-stack buffers\n     - CVE-2026-11979",
        "title": "Details"
      }
    ],
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775"
      },
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        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/advisories/2026/clsa-2026_1788696775.json"
      }
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    "tracking": {
      "current_release_date": "2026-09-06T12:13:43Z",
      "generator": {
        "date": "2026-09-06T12:13:43Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1788696775",
      "initial_release_date": "2026-09-06T12:13:43Z",
      "revision_history": [
        {
          "date": "2026-09-06T12:13:43Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-11979, CVE-2026-6653"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-11979"
        },
        {
          "category": "external",
          "summary": "https://cert.pl/en/posts/2026/06/CVE-2026-11979",
          "url": "https://cert.pl/en/posts/2026/06/CVE-2026-11979"
        },
        {
          "category": "external",
          "summary": "https://gitlab.gnome.org/GNOME/libxml2/-/commit/c2e233fc1b341685fc99621b2768b503f777a72e",
          "url": "https://gitlab.gnome.org/GNOME/libxml2/-/commit/c2e233fc1b341685fc99621b2768b503f777a72e"
        }
      ],
      "release_date": "2026-06-29T14:16:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-06T12:12:56.774213Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775",
          "product_ids": [
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:libxml2-doc-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.all",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    },
    {
      "cve": "CVE-2026-6653",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "description",
          "text": "Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "fixed": [
          "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
          "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
          "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
          "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
          "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
          "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
          "Debian-11:libxml2-doc-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.all",
          "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
          "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
          "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
          "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
          "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
          "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-6653"
        },
        {
          "category": "external",
          "summary": "https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260",
          "url": "https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260"
        },
        {
          "category": "external",
          "summary": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058",
          "url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058"
        }
      ],
      "release_date": "2026-06-22T14:17:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-06T12:12:56.774213Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775",
          "product_ids": [
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-dev-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:libxml2-doc-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.all",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:libxml2-utils-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.amd64",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.arm64",
            "Debian-11:python3-libxml2-0:2.9.10+dfsg-6.7+deb11u10+tuxcare.els1.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1788696775"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ]
    }
  ]
}