CVE catalog
CVE-2025-30194
dnsdist: CVE-2025-30194
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.25% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | dnsdist | sid | 2.1.3-1 | fixed |
| Debian | dnsdist | forky | 2.1.3-1 | fixed |
| Debian | dnsdist | trixie | 1.9.16-0+deb13u1 | fixed |
| Debian | dnsdist | trixie-security | 1.9.16-0+deb13u1 | fixed |
| Debian | dnsdist | bookworm | 1.7.3-2 | not affected |
| Opensuse | dnsdist | tumbleweed | 1.9.10-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | dnsdist | source | sid | 1.9.9-1 | not yet assigned | Not reported | [1104351] |
| Debian | dnsdist | source | forky | 1.9.9-1 | not yet assigned | Not reported | [1104351] |
| Debian | dnsdist | source | trixie | 1.9.9-1 | not yet assigned | Not reported | [1104351] |
| Debian | dnsdist | source | bookworm | Not affected | unimportant | Not reported | [1104351] |
| Opensuse | dnsdist | rpm | tumbleweed | 1.9.10-2.1 | Not reported | OPENSUSE-SU-2025:15157-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [dnsdist]Not affected
Details (2)
1.7.3-2· amd64 · bookwormNot affected
dsa · dnsdist · debian · bookworm
1.7.3-2· arm64 · bookwormNot affected
dsa · dnsdist · debian · bookworm
[Debian 13 (Trixie)]
- [dnsdist]Fixed
Details (4)
1.9.15-0+deb13u1· amd64 · trixieFixed · Fixed:
1.9.9-1dsa · dnsdist · debian · 13
1.9.15-0+deb13u1· arm64 · trixieFixed · Fixed:
1.9.9-1dsa · dnsdist · debian · 13
1.9.16-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.9.9-1dsa · dnsdist · debian · 13
1.9.16-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.9.9-1dsa · dnsdist · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_01743-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-30194]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-30194]
- [https://osv.dev/vulnerability/openSUSE-SU-2025:15157-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-30194]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-30194.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-0902.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]