Medium severity5.3NVD Advisory· Published Sep 16, 2026· Updated Sep 23, 2026
CVE-2026-80225
CVE-2026-80225
Description
In NLnetLabs Unbound up to and including 1.26.0, a degradation of service vulnerability is present in the TCP/DoT reading procedure where there is no limit on consecutive reads. A malicious actor that can stream and sustain a rate of distinct uncached names over the TCP/DoT connection, monopolizes a single worker's entire event loop for as long as its writes stay ahead of the drain.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3Patches
Vulnerability mechanics
References
1- www.nlnetlabs.nl/downloads/unbound/CVE-2026-80225.txtnvdPatchVendor Advisory
News mentions
1- Critical Unbound DNSSEC Validator Flaw Could Allow RCE via a Malicious DNS ZoneThe Hacker News · Sep 17, 2026