CVE catalog
CVE-2025-30193
DNSdist vulnerabilities
- 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
- 0.62% · Oct 25, 2026
In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.10 version. A workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting. We would like to thank Renaud Allard 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 | vulnerable |
| Ubuntu | dnsdist | noble | Not reported | vulnerable |
| Ubuntu | dnsdist | noble | 1.8.3-2ubuntu0.1~esm1 | fixed |
| Ubuntu | dnsdist | pro | 1.8.0-1 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.2-1 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.2-2 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.2-3 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.3-1 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.3-2 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.3-2build1 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.3-2build2 | vulnerable |
| Ubuntu | dnsdist | pro | 1.8.3-2ubuntu0.1~esm1 | fixed |
| Suse | dnsdist | linux enterprise module for basesystem 15 sp6 | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise high performance computing 15 sp4-espos | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise high performance computing 15 sp4-ltss | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise high performance computing 15 sp5-espos | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise high performance computing 15 sp5-ltss | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise server 15 sp4-ltss | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise server 15 sp5-ltss | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise server for sap applications 15 sp4 | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise server for sap applications 15 sp5 | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | manager proxy 4.3 | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | manager server 4.3 | 1.8.0-150400.9.6.1 | fixed |
| Opensuse | dnsdist | leap 15.6 | 1.8.0-150400.9.6.1 | fixed |
| Suse | dnsdist | linux enterprise server 15 sp3-ltss | 1.8.0-150100.3.8.1 | fixed |
| Suse | dnsdist | enterprise storage 7.1 | 1.8.0-150100.3.8.1 | fixed |
| Suse | dnsdist | linux enterprise module for basesystem 15 sp7 | 1.9.10-150700.3.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | dnsdist | source | sid | 1.9.10-1 | not yet assigned | Not reported | [1106207] |
| Debian | dnsdist | source | forky | 1.9.10-1 | not yet assigned | Not reported | [1106207] |
| Debian | dnsdist | source | trixie | 1.9.10-1 | not yet assigned | Not reported | [1106207] |
| Debian | dnsdist | source | bookworm | (unfixed) | end-of-life | Not reported | [1106207] |
| Ubuntu | dnsdist | deb | noble | 1.8.3-2ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | dnsdist | deb | pro | 1.8.3-2ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2025-30193 | Not reported |
| Suse | dnsdist | rpm | linux enterprise module for basesystem 15 sp6 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise high performance computing 15 sp4-espos | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise high performance computing 15 sp4-ltss | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise high performance computing 15 sp5-espos | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise high performance computing 15 sp5-ltss | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise server 15 sp4-ltss | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise server 15 sp5-ltss | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise server for sap applications 15 sp4 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise server for sap applications 15 sp5 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | manager proxy 4.3 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | manager server 4.3 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Opensuse | dnsdist | rpm | leap 15.6 | 1.8.0-150400.9.6.1 | Not reported | SUSE-SU-2025:01745-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise server 15 sp3-ltss | 1.8.0-150100.3.8.1 | Not reported | SUSE-SU-2025:01792-1 | Not reported |
| Suse | dnsdist | rpm | enterprise storage 7.1 | 1.8.0-150100.3.8.1 | Not reported | SUSE-SU-2025:01792-1 | Not reported |
| Suse | dnsdist | rpm | linux enterprise module for basesystem 15 sp7 | 1.9.10-150700.3.3.1 | Not reported | SUSE-SU-2025:01743-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [dnsdist]Affected
Details (2)
1.7.3-2· amd64 · bookwormAffected
usn · dnsdist · debian · bookworm; usn · dnsdist · debian · 12
1.7.3-2· arm64 · bookwormAffected
usn · dnsdist · debian · bookworm; usn · dnsdist · debian · 12
[Debian 13 (Trixie)]
- [dnsdist]Fixed
Details (4)
1.9.15-0+deb13u1· amd64 · trixieFixed · Fixed:
1.9.10-1usn · dnsdist · debian · 13
1.9.15-0+deb13u1· arm64 · trixieFixed · Fixed:
1.9.10-1usn · dnsdist · debian · 13
1.9.16-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.9.10-1usn · dnsdist · debian · 13
1.9.16-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.9.10-1usn · dnsdist · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_01743-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-30193]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01743-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01745-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01792-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-30193]
- [https://security-tracker.debian.org/tracker/CVE-2025-30193]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-30193.json]
- [https://ubuntu.com/security/notices/USN-8037-1]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]