CVE-2026-80225 — Possible degradation of service from continuous queries on the same TCP/DoT connection

CVE-2026-80225

Possible degradation of service from continuous queries on the same TCP/DoT connection PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
NLnet Labs / Unbound	affected 0 before 1.26.1

CWE

CWE-770

References

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-80225.txt

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.