openSUSE-SU-2026:21192-1: important: Security update for dnsmasq

openSUSE security update: security update for dnsmasq
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21192-1
Rating: important
References:

  * bsc#1268764



Cross-References:

  * CVE-2026-12725
  * CVE-2026-2291
  * CVE-2026-6507



CVSS scores:

  * CVE-2026-12725 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-12725 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/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
  * 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-2026-6507 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-6507 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 3 vulnerabilities and has one bug fix can now be installed.

Description:

This update for dnsmasq fixes the following issues

Update to 2.93:

- CVE-2026-12725: heap buffer overflow in `log_query()` when logging unsupported DS/DNSKEY replies (bsc#1268764).

Changes for dnsmasq:

 * CVE-2026-12725, bsc#1268764: Heap buffer overflow in
 `log_query()` when logging unsupported DS/DNSKEY replies.
 * Fix a corner-case in DNSSEC validation with wildcards.
 * Fix DNSSEC failure with spurious RRSIGs.
 * Fix DNSSEC fail with CNAME replies to DS queries.
 * Fix regression in 2.92 release which broke DHCPv6 when a DHCP
 relay is in use.
 * Modify the inotify implementation so that inotify watches are
 only created after dnsmasq has changed permissions and userid.
 * CVE-2026-2291: Rework storage allocation for domain names.


Patch instructions:

   To install this openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-1102=1

Package List:

- openSUSE Leap 16.0:

  dnsmasq-2.93-160000.1.1
  dnsmasq-utils-2.93-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2026-12725.html
  * https://www.suse.com/security/cve/CVE-2026-2291.html
  * https://www.suse.com/security/cve/CVE-2026-6507.html