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SUSE dnsmasq Important DoS Vulnerability 2026-1827-1 CVE-2026-2291

suse
Calendar Grey May 13, 2026
Dist Suse Esm H88
Update for dnsmasq fixes important security issue allowing DoS attacks. Install recommended patches promptly.
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: * openSUSE Leap 15.4 zypper in -t patch SUSE-2026-1827=1 * openSUSE Leap 15.6 zypper in -t patch openSUSE-SLE-15.6-2026-1827=1 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1827=1 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1827=1 * SUSE Linux Enterprise Server 15 SP4 LTSS

Topics%20covered

Topics Covered

security advisory update SuSE DoS important dnsmasq

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:

* Basesystem Module 15-SP7

* openSUSE Leap 15.4

* openSUSE Leap 15.6

* SUSE Linux Enterprise Desktop 15 SP7

* SUSE Linux Enterprise High Performance Computing 15 SP4

* SUSE Linux Enterprise High Performance Computing 15 SP5

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5

* SUSE Linux Enterprise Micro 5.3

* SUSE Linux Enterprise Micro 5.4

* SUSE Linux Enterprise Micro 5.5

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1827-1
Release Date: 2026-05-12T09:06:53Z
Rating: important

Topics%20covered

Topics Covered

security advisory update SuSE DoS important dnsmasq

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