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      "text": "Important"
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    "category": "csaf_security_advisory",
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      "text": "TuxCare License Agreement",
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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      {
        "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: Denial of service via quadratic mark attachment in GPOS\n     - debian/patches/CVE-2023-25193.patch: memoize the last base glyph in\n       MarkBasePos/MarkLigPos so backward search no longer rescans the buffer\n     - CVE-2023-25193",
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        "date": "2026-09-16T15:37:56Z",
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      "id": "CLSA-2026:1789573030",
      "initial_release_date": "2026-09-16T15:37:56Z",
      "revision_history": [
        {
          "date": "2026-09-16T15:37:56Z",
          "number": "1",
          "summary": "Initial version"
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        "product_reference": "libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-11"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.armel as a component of Debian 11",
          "product_id": "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.armel"
        },
        "product_reference": "libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.armel",
        "relates_to_product_reference": "Debian-11"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libharfbuzz-doc-0:2.7.4-1+tuxcare.els1.all as a component of Debian 11",
          "product_id": "Debian-11:libharfbuzz-doc-0:2.7.4-1+tuxcare.els1.all"
        },
        "product_reference": "libharfbuzz-doc-0:2.7.4-1+tuxcare.els1.all",
        "relates_to_product_reference": "Debian-11"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-25193",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "description",
          "text": "hb-ot-layout-gsubgpos.hh in HarfBuzz through 6.0.0 allows attackers to trigger O(n^2) growth via consecutive marks during the process of looking back for base glyphs when attaching marks.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "fixed": [
          "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.armel",
          "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.armel",
          "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.armel",
          "Debian-11:libharfbuzz-doc-0:2.7.4-1+tuxcare.els1.all",
          "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.armel",
          "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.armel",
          "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.amd64",
          "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.arm64",
          "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.armel"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2023-25193"
        },
        {
          "category": "external",
          "summary": "https://chromium.googlesource.com/chromium/src/+/e1f324aa681af54101c1f2d173d92adb80e37088/DEPS#361",
          "url": "https://chromium.googlesource.com/chromium/src/+/e1f324aa681af54101c1f2d173d92adb80e37088/DEPS#361"
        },
        {
          "category": "external",
          "summary": "https://github.com/harfbuzz/harfbuzz/blob/2822b589bc837fae6f66233e2cf2eef0f6ce8470/src/hb-ot-layout-gsubgpos.hh",
          "url": "https://github.com/harfbuzz/harfbuzz/blob/2822b589bc837fae6f66233e2cf2eef0f6ce8470/src/hb-ot-layout-gsubgpos.hh"
        },
        {
          "category": "external",
          "summary": "https://github.com/harfbuzz/harfbuzz/commit/85be877925ddbf34f74a1229f3ca1716bb6170dc",
          "url": "https://github.com/harfbuzz/harfbuzz/commit/85be877925ddbf34f74a1229f3ca1716bb6170dc"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWCHWSICWVZSAXP2YAXM65JC2GR53547/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWCHWSICWVZSAXP2YAXM65JC2GR53547/"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5M2GSAIHFPLHYJXUPQ2QDJCLWXUGO3/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5M2GSAIHFPLHYJXUPQ2QDJCLWXUGO3/"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20230725-0006/",
          "url": "https://security.netapp.com/advisory/ntap-20230725-0006/"
        }
      ],
      "release_date": "2023-02-04T20:15:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-16T15:37:12.492561Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1789573030",
          "product_ids": [
            "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:gir1.2-harfbuzz-0.0-0:2.7.4-1+tuxcare.els1.armel",
            "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:libharfbuzz-bin-0:2.7.4-1+tuxcare.els1.armel",
            "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:libharfbuzz-dev-0:2.7.4-1+tuxcare.els1.armel",
            "Debian-11:libharfbuzz-doc-0:2.7.4-1+tuxcare.els1.all",
            "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:libharfbuzz-gobject0-0:2.7.4-1+tuxcare.els1.armel",
            "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:libharfbuzz-icu0-0:2.7.4-1+tuxcare.els1.armel",
            "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.amd64",
            "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.arm64",
            "Debian-11:libharfbuzz0b-0:2.7.4-1+tuxcare.els1.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1789573030"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}