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    "aggregate_severity": {
      "text": "Important"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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    "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: Excessive NSEC3 iterations cause high CPU load during\n     insecure delegation validation (DNSSEC CPU denial of service)\n     - debian/patches/CVE-2026-1519.patch: cap NSEC3 iterations at\n       DNS_NSEC3_MAXITERATIONS (150) during the insecurity proof and treat the\n       delegation as insecure when the limit is exceeded; skip re-verifying\n       already-secure rdatasets in the negative-response and verify paths, in\n       lib/dns/validator.c and lib/dns/include/dns/types.h.\n     - CVE-2026-1519",
        "title": "Details"
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        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1785886464",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1785886464"
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        "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu20.04els/advisories/2026/clsa-2026_1785886464.json"
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      "current_release_date": "2026-08-04T23:35:03Z",
      "generator": {
        "date": "2026-08-04T23:35:03Z",
        "engine": {
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      "id": "CLSA-2026:1785886464",
      "initial_release_date": "2026-08-04T23:35:03Z",
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        {
          "date": "2026-08-04T23:35:03Z",
          "number": "1",
          "summary": "Initial version"
        }
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      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-1519"
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          "category": "description",
          "text": "If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries).\nThis issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "date": "2026-08-04T23:34:26.538559Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1785886464",
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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