CVE-2026-34933
Avahi: Reachable assertion in `transport_flags_from_domain()` via conflicting publish flags crashes avahi-daemon
CVE-2026-34933 is fixed in 20 products on 1 platform, first by avahi-autoipd 0.7-3.1ubuntu1.3+esm4, released April 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0021
10th percentile
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| avahi · opensuse-leap 16.0 | 0.8-160000.5.1 | OPENSUSE-SU-2026:21014-1 | Jun 22, 2026 |
| avahi · sles 16.0 | 0.8-160000.5.1 | SUSE-SU-2026:22338-1 | Jun 22, 2026 |
| avahi-autoipd · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-autoipd 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-autoipd · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-autoipd 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-autoipd · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-autoipd 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-autoipd · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-autoipd 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-autoipd · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-autoipd 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-autoipd · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-autoipd 0.8-18ubuntu1.1 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-daemon 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-daemon 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-daemon 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-daemon 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-daemon 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-daemon · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-daemon 0.8-18ubuntu1.1 | Apr 3, 2026 |
| avahi-discover · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-discover 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-discover · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-discover 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-discover · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-discover 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-discover · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-discover 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-discover · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-discover 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-discover · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-discover 0.8-18ubuntu1.1 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-dnsconfd 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-dnsconfd 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-dnsconfd 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-dnsconfd 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-dnsconfd 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-dnsconfd · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-dnsconfd 0.8-18ubuntu1.1 | Apr 3, 2026 |
| avahi-glib2 · opensuse-leap 16.0 | 0.8-160000.5.1 | OPENSUSE-SU-2026:21014-1 | Jun 22, 2026 |
| avahi-glib2 · sles 16.0 | 0.8-160000.5.1 | SUSE-SU-2026:22338-1 | Jun 22, 2026 |
| avahi-qt6 · opensuse-leap 16.0 | 0.8-160000.5.1 | OPENSUSE-SU-2026:21014-1 | Jun 22, 2026 |
| avahi-ui-utils · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-ui-utils 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-ui-utils · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-ui-utils 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-ui-utils · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-ui-utils 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-ui-utils · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-ui-utils 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-ui-utils · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-ui-utils 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-ui-utils · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-ui-utils 0.8-18ubuntu1.1 | Apr 3, 2026 |
| avahi-utils · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | avahi-utils 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| avahi-utils · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | avahi-utils 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| avahi-utils · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | avahi-utils 0.8-5ubuntu5.5 | Apr 3, 2026 |
| avahi-utils · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | avahi-utils 0.8-13ubuntu6.2 | Apr 3, 2026 |
| avahi-utils · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | avahi-utils 0.8-16ubuntu3.2 | Apr 3, 2026 |
| avahi-utils · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | avahi-utils 0.8-18ubuntu1.1 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | gir1.2-avahi-0.6 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | gir1.2-avahi-0.6 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | gir1.2-avahi-0.6 0.8-5ubuntu5.5 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | gir1.2-avahi-0.6 0.8-13ubuntu6.2 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | gir1.2-avahi-0.6 0.8-16ubuntu3.2 | Apr 3, 2026 |
| gir1.2-avahi-0.6 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | gir1.2-avahi-0.6 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-client3 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-client3 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-client3 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-client3 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-client3 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-client3 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-client3 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-common-data 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-common-data 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-common-data 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-common-data 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-common-data 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-common-data · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-common-data 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-common3 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-common3 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-common3 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-common3 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-common3 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-common3 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-common3 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-compat-libdnssd1 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-compat-libdnssd1 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-compat-libdnssd1 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-compat-libdnssd1 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-compat-libdnssd1 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-compat-libdnssd1 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-compat-libdnssd1 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-core7 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-core7 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-core7 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-core7 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-core7 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-core7 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-core7 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-glib1 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-glib1 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-glib1 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-glib1 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-glib1 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-glib1 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-glib1 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-gobject0 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-gobject0 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-gobject0 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-gobject0 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-gobject0 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-gobject0 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-gobject0 0.8-18ubuntu1.1 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | libavahi-ui-gtk3-0 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | libavahi-ui-gtk3-0 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | libavahi-ui-gtk3-0 0.8-5ubuntu5.5 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | libavahi-ui-gtk3-0 0.8-13ubuntu6.2 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | libavahi-ui-gtk3-0 0.8-16ubuntu3.2 | Apr 3, 2026 |
| libavahi-ui-gtk3-0 · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | libavahi-ui-gtk3-0 0.8-18ubuntu1.1 | Apr 3, 2026 |
| python-avahi · Ubuntu 18.04.6 LTS (bionic) | 0.7-3.1ubuntu1.3+esm4 | python-avahi 0.7-3.1ubuntu1.3+esm4 | Apr 3, 2026 |
| python-avahi · Ubuntu 20.04 LTS (focal) | 0.7-4ubuntu7.3+esm2 | python-avahi 0.7-4ubuntu7.3+esm2 | Apr 3, 2026 |
| python3-avahi · Ubuntu 22.04.1 LTS (jammy) | 0.8-5ubuntu5.5 | python3-avahi 0.8-5ubuntu5.5 | Apr 3, 2026 |
| python3-avahi · Ubuntu 24.04.5 LTS (noble) | 0.8-13ubuntu6.2 | python3-avahi 0.8-13ubuntu6.2 | Apr 3, 2026 |
| python3-avahi · Ubuntu 25.10 (questing) | 0.8-16ubuntu3.2 | python3-avahi 0.8-16ubuntu3.2 | Apr 3, 2026 |
| python3-avahi · Ubuntu 26.04.1 LTS (resolute) | 0.8-18ubuntu1.1 | python3-avahi 0.8-18ubuntu1.1 | Apr 3, 2026 |
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