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CVE-2026-80225

nvd nist
Published: Sep 16, 2026Modified: Sep 23, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

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.

Affected (1)

Products: Nlnetlabs: Unbound
1 product
Unbound
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
version < 1.26.1

References (1)

Source: sep@nlnetlabs.nl
PatchVendor Advisory

Timeline

No history available yet.