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openSUSE Leap 16.0 avahi Moderate DoS Fix Advisory 2026-21417-1

opensuse
Calendar Grey July 24, 2026
Scroller Opensuse
The openSUSE avahi update addresses a moderate DoS issue through client limit management, ensuring enhanced system stability.
openSUSE has released a security update for avahi addressing a local DoS vulnerability (CVE-2025-59529) in Leap 16.0, along with a bug fix and package adjustments.

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

Topics%20covered

Topics Covered

security advisory moderate update DoS avahi OpenSUSE

Patch

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

* bsc#1255451

References:

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

Severity
moderate
Lowest
Low
Medium
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Critical

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

Topics%20covered

Topics Covered

security advisory moderate update DoS avahi OpenSUSE

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