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SUSE dnsdist Low DoS Vulnerabilities Resolved - Update 2026-20995-1

suse
Calendar Grey April 9, 2026
Dist Suse Esm H88
SUSE update for dnsdist addresses critical vulnerabilities. Ensure your servers are protected against denial of service and more.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for dnsdist fixes the following issues: Update to dnsdist 1.9.11: * CVE-2025-8671: add mitigations for the HTTP/2 MadeYouReset attack (bsc#1253852). * CVE-2025-30187: denial of service via crafted DoH exchange (bsc#1250054). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server - BCI 16.0 zypper in -t patch SUSE-SLES-16.0-475=1 ## Package List: * SUSE Linux Enterprise Server - BCI 16.0 (aarch64 s390x x86_64) * dnsdist-debugsource-1.9.11-160000.1.1 * dnsdist-1.9.11-160000.1.1 * dnsdist-debuginfo-1.9.11-160000.1.1

Topics%20covered

Topics Covered

security advisory denial of service SuSE important HTTP/2 dnsdist

References

* bsc#1250054

* bsc#1253852

Cross-

* CVE-2025-30187

* CVE-2025-8671

CVSS scores:

* CVE-2025-30187 ( SUSE ): 6.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

* CVE-2025-30187 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

* CVE-2025-30187 ( NVD ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

* CVE-2025-8671 ( SUSE ): 8.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2025-8671 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-8671 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* SUSE Linux Enterprise Server - BCI 16.0

An update that solves two vulnerabilities can now be installed.

##

* https://www.suse.com/security/cve/CVE-2025-30187.html

Severity
low
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20995-1
Release Date: 2026-04-02T09:11:51Z
Rating: low

Topics%20covered

Topics Covered

security advisory denial of service SuSE important HTTP/2 dnsdist

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