openSUSE-SU-2026:21417-1: moderate: Security update for avahi

openSUSE security update: security update for avahi
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21417-1
Rating: moderate
References:

  * bsc#1255451



Cross-References:

  * CVE-2025-59529



CVSS scores:

  * CVE-2025-59529 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-59529 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

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

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

Description:

This update for avahi fixes the following issues:

- CVE-2025-59529: local DoS due to simple protocol server ignoring client limit CLIENTS_MAX (bsc#1255451).

Changes for avahi:

- Make /var/lib/avahi-autoipd a ghost dir instead of packaging it
 since avahi-autoipd creates it on start (jsc#PED-14836).
- Use libalternative instead of update-alternatives in TW and SLFO
 (jsc#PED-14835).


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-16.0-1328=1

Package List:

- openSUSE Leap 16.0:

  avahi-0.8-160000.6.1
  avahi-autoipd-0.8-160000.6.1
  avahi-compat-howl-devel-0.8-160000.6.1
  avahi-compat-mDNSResponder-devel-0.8-160000.6.1
  avahi-lang-0.8-160000.6.1
  avahi-utils-0.8-160000.6.1
  avahi-utils-gtk-0.8-160000.6.1
  libavahi-client3-0.8-160000.6.1
  libavahi-common3-0.8-160000.6.1
  libavahi-core7-0.8-160000.6.1
  libavahi-devel-0.8-160000.6.1
  libavahi-glib-devel-0.8-160000.6.1
  libavahi-glib1-0.8-160000.6.1
  libavahi-gobject-devel-0.8-160000.6.1
  libavahi-gobject0-0.8-160000.6.1
  libavahi-libevent1-0.8-160000.6.1
  libavahi-qt6-1-0.8-160000.6.1
  libavahi-qt6-devel-0.8-160000.6.1
  libavahi-ui-gtk3-0-0.8-160000.6.1
  libdns_sd-0.8-160000.6.1
  libhowl0-0.8-160000.6.1
  python3-avahi-gtk-0.8-160000.6.1
  python313-avahi-0.8-160000.6.1
  typelib-1_0-Avahi-0_6-0.8-160000.6.1

References:

  * https://www.suse.com/security/cve/CVE-2025-59529.html