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CVE-2025-30194

CVE-2025-30194 · Denial of service via crafted DoH exchange

This page contains facts from public vulnerability sources. Check the original advisory before updating.

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.

CVSS 7.5 · High · EPSS 2.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • dnsdist

    Versions
    • ≥ 1.9.0, < 1.9.9: Affected (semver)

    Update to 1.9.9

  • dnsdist Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.9.9-1

    Update to 1.9.9-1

  • dnsdist Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.9.9-1

    Update to 1.9.9-1

Original sources

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