Security update for dnsmasq

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

Description:

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
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    • dnsmasq-debugsource-2.78-18.24.1
    • dnsmasq-2.78-18.24.1
    • dnsmasq-debuginfo-2.78-18.24.1

References: