CVE-2025-30194 – DNSdist DoH Double-Free Denial of Service

The following table lists the changes that have been made to the
CVE-2025-30194 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 29, 2025

    Action Type Old Value New Value
    Added Description 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.

    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-416
    Added Reference https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html
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