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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.",
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          "title": "Vulnerability description"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-55717"
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          "details": "This issue is a denial‑of‑service only and requires a narrow, non‑default setup—serve-expired must be enabled and respip/RPZ CNAME‑override rules configured—plus an attacker‑controlled delegated zone that returns an A/AAAA within the operator’s response‑ip subnet and carefully timed delayed responses. Default Unbound configurations do not enable these features, so the vulnerable serve‑expired‑client‑timeout path is not exercised. Given the strict configuration and timing prerequisites and the lack of confidentiality or integrity impact, this can be safely deprioritized for managed enterprise resolver deployments.",
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}