SUSE-SU-2026:22338-1: moderate: Security update for avahi

[SLE-UPDATES]

# Security update for avahi

Announcement ID: SUSE-SU-2026:22338-1  
Release Date: 2026-06-22T14:40:15Z  
Rating: moderate  
References:

  * bsc#1257235
  * bsc#1261546

  
Cross-References:

  * CVE-2026-24401
  * CVE-2026-34933

  
CVSS scores:

  * CVE-2026-24401 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-24401 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-24401 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-34933 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-34933 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for avahi fixes the following issues:

  * CVE-2026-34933: reachable assertion in `transport_flags_from_domain` can
    crash the `avahi-daemon` (bsc#1261546).
  * CVE-2026-24401: unsolicited mDNS responses containing a recursive CNAME
    record can crash the `avahi-daemon` (bsc#1257235).

## 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 16.0  
    zypper in -t patch SUSE-SLES-16.0-1026=1

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1026=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * avahi-autoipd-0.8-160000.5.1
    * libhowl0-debuginfo-0.8-160000.5.1
    * libavahi-common3-0.8-160000.5.1
    * libavahi-glib-devel-0.8-160000.5.1
    * libavahi-client3-debuginfo-0.8-160000.5.1
    * libdns_sd-0.8-160000.5.1
    * libavahi-glib1-0.8-160000.5.1
    * libavahi-core7-0.8-160000.5.1
    * libdns_sd-debuginfo-0.8-160000.5.1
    * libavahi-ui-gtk3-0-debuginfo-0.8-160000.5.1
    * avahi-utils-gtk-0.8-160000.5.1
    * libavahi-ui-gtk3-0-0.8-160000.5.1
    * avahi-autoipd-debuginfo-0.8-160000.5.1
    * typelib-1_0-Avahi-0_6-0.8-160000.5.1
    * avahi-debuginfo-0.8-160000.5.1
    * libavahi-core7-debuginfo-0.8-160000.5.1
    * libavahi-gobject-devel-0.8-160000.5.1
    * libavahi-devel-0.8-160000.5.1
    * avahi-0.8-160000.5.1
    * libavahi-client3-0.8-160000.5.1
    * libavahi-common3-debuginfo-0.8-160000.5.1
    * libavahi-libevent1-debuginfo-0.8-160000.5.1
    * python313-avahi-0.8-160000.5.1
    * avahi-utils-debuginfo-0.8-160000.5.1
    * libavahi-gobject0-debuginfo-0.8-160000.5.1
    * libhowl0-0.8-160000.5.1
    * avahi-utils-gtk-debuginfo-0.8-160000.5.1
    * avahi-debugsource-0.8-160000.5.1
    * avahi-compat-mDNSResponder-devel-0.8-160000.5.1
    * libavahi-gobject0-0.8-160000.5.1
    * avahi-glib2-debugsource-0.8-160000.5.1
    * python3-avahi-gtk-0.8-160000.5.1
    * libavahi-glib1-debuginfo-0.8-160000.5.1
    * libavahi-libevent1-0.8-160000.5.1
    * avahi-utils-0.8-160000.5.1
  * SUSE Linux Enterprise Server 16.0 (noarch)
    * avahi-lang-0.8-160000.5.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * avahi-autoipd-0.8-160000.5.1
    * libhowl0-debuginfo-0.8-160000.5.1
    * libavahi-common3-0.8-160000.5.1
    * libavahi-glib-devel-0.8-160000.5.1
    * libavahi-client3-debuginfo-0.8-160000.5.1
    * libdns_sd-0.8-160000.5.1
    * libavahi-glib1-0.8-160000.5.1
    * libavahi-core7-0.8-160000.5.1
    * libdns_sd-debuginfo-0.8-160000.5.1
    * libavahi-ui-gtk3-0-debuginfo-0.8-160000.5.1
    * avahi-utils-gtk-0.8-160000.5.1
    * libavahi-ui-gtk3-0-0.8-160000.5.1
    * typelib-1_0-Avahi-0_6-0.8-160000.5.1
    * avahi-autoipd-debuginfo-0.8-160000.5.1
    * avahi-debuginfo-0.8-160000.5.1
    * libavahi-core7-debuginfo-0.8-160000.5.1
    * libavahi-devel-0.8-160000.5.1
    * avahi-0.8-160000.5.1
    * libavahi-gobject-devel-0.8-160000.5.1
    * libavahi-client3-0.8-160000.5.1
    * python313-avahi-0.8-160000.5.1
    * libavahi-common3-debuginfo-0.8-160000.5.1
    * libavahi-libevent1-debuginfo-0.8-160000.5.1
    * avahi-utils-debuginfo-0.8-160000.5.1
    * libavahi-gobject0-debuginfo-0.8-160000.5.1
    * libhowl0-0.8-160000.5.1
    * avahi-utils-gtk-debuginfo-0.8-160000.5.1
    * avahi-debugsource-0.8-160000.5.1
    * avahi-compat-mDNSResponder-devel-0.8-160000.5.1
    * libavahi-gobject0-0.8-160000.5.1
    * avahi-glib2-debugsource-0.8-160000.5.1
    * python3-avahi-gtk-0.8-160000.5.1
    * libavahi-glib1-debuginfo-0.8-160000.5.1
    * libavahi-libevent1-0.8-160000.5.1
    * avahi-utils-0.8-160000.5.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * avahi-lang-0.8-160000.5.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-24401.html
  * https://www.suse.com/security/cve/CVE-2026-34933.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1257235
  * https://bugzilla.suse.com/show_bug.cgi?id=1261546

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