PT-2025-18142 · Dnsdist+1 · Dnsdist+1

Charles Howes · Published 2025-04-29 · Updated 2025-05-29 · CVE-2025-30194

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions DNSdist versions prior to 1.9.9

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.

Recommendations To resolve the issue, upgrade to the patched 1.9.9 version. As a temporary workaround, consider switching to the h2o provider until DNSdist has been upgraded to a fixed version.

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-00246

CVE-2025-30194

OPENSUSE-SU-2025:15157-1

SUSE-SU-2025:01743-1

Affected Products

Dnsdist

Suse

References · 43

• https://cve.org/CVERecord?id=CVE-2025-30194 · Security Note
• https://bdu.fstec.ru/vul/2026-00246 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-30194 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:01743-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15157-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-30194 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-30194 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-30194 · Security Note
• https://osv.dev/vulnerability/CVE-2025-30194 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-30194 · Vendor Advisory
• https://github.com/PowerDNS/pdns/pull/15482 · Note
• https://github.com/PowerDNS/pdns/issues/15475 · Note
• https://suse.com/security/cve/CVE-2025-30193 · Note
• https://twitter.com/syedaquib77/status/1917415688869966313 · Twitter Post
• https://t.me/pentestingnews/60423 · Telegram Post