Threats Tagged 'cve-2026-32665'
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Threats Tagged 'cve-2026-32665'
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CVE-2026-32665: CWE-1284: Improper Validation of Specified Quantity in Input in NLnet Labs UnboundCVE-2026-32665 0 In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, when downstream DNS-over-QUIC (DoQ) is enabled, the first two bidirectional streams on a new QUIC connection (stream_id 0 and 4) bypass the per-stream 'quic-size' gate entirely, and large input buffers are allocated later, after only the 2-byte length prefix has been received from the initial streams. As a result, a remote client can make Unbound exceed the configured 'quic-size' limit with low-cost input. Using only one connection and two streams, each sending a declared 65535-byte length prefix and then holding the streams open, a client can already trivially make Unbound roughly allocate double that amount. This is a remote availability issue / memory-accounting bypass in the downstream DoQ implementation that leads to denial of service for new DoQ clients. This vulnerability needs Unbound to be compiled with DoQ support ('--with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces. Join the discussion | CVE Database V5 | 07/22/2026, 13:04:18 UTC Added: 07/22/2026, 13:22:40 UTC |
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