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…
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 clie
Read at NIST National Vulnerability Database (CVE API 2.0)
- Product
- dnsmasq / Unbound / PowerDNS
- CVSS
- 7.5
- EPSS
- 0.003 (p21)
- Exposure class
- Edge / VPN / firewall
Why it ranks 34 (Notable)
- CVSS 7.5 high
- Exposed product class: edge / VPN / firewall
- Covered by 3 independent sources
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
- CVE-2026-32665 on this site · NVD · CVE.org · Vulnpedia
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