dnssec validation

  1. CVE-2026-42923 DNSSEC NSEC3 Hash DoS: Unbound Fix for Windows Admins

    CVE-2026-42923 is a medium-severity DNSSEC validation flaw disclosed in May 2026 affecting NLnet Labs Unbound through version 1.25.0, where specially crafted NSEC3 records can force excessive hash calculations and degrade resolver availability over the network. It is not the sort of bug that...
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    • cve-2026-42923 dnssec validation nlnet unbound windows dns
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