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SUSE dnsmasq Significant DoS Attack Mitigation Update 2026-1826-2

suse
Calendar Grey May 13, 2026
Dist Suse Esm H88
An important SUSE update addresses a potential issue in dnsmasq allowing false data caching. Install urgently!
An update that solves one vulnerability can now be installed.

Summary

## This update for dnsmasq fixes the following issue: * CVE-2026-2291: VU#471747: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect (bsc#1258251). ## 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 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-1826=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1826=1 ## Package List: * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64) * dnsmasq-debugsource-2.78-18.24.1 * dnsmasq-2.78-18.24.1 * dnsmasq-debuginfo-2.78-18.24.1

Topics%20covered

Topics Covered

security advisory SuSE DoS important dnsmasq attack redirect

References

* bsc#1258251

Cross-

* CVE-2026-2291

CVSS scores:

* CVE-2026-2291 ( SUSE ): 9.2

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

* CVE-2026-2291 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products:

* SUSE Linux Enterprise High Performance Computing 12 SP5

* SUSE Linux Enterprise Server 12 SP5

* SUSE Linux Enterprise Server 12 SP5 LTSS

* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security

* SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves one vulnerability can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-2291.html

* https://bugzilla.suse.com/show_bug.cgi?id=1258251

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1826-1
Release Date: 2026-05-12T09:04:35Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS important dnsmasq attack redirect

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