Description
A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | avahi | All avahi versions 0.6 up to 0.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | avahi | 0.8-7 | — |
| Debian 13 | avahi | 0.8-7 | — |
| Debian 12 | avahi | 0.8-7 | — |
| Debian 10 | avahi | 0.7-4+deb10u3 | DLA-3466-1 |
| Debian 9 | avahi | 0.6.32-2+deb9u1 | DLA-3047-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | avahi | 0.7-4ubuntu7.1 | USN-5008-1 |
| Ubuntu 18.04 LTS | avahi | 0.7-3.1ubuntu1.3 | USN-5008-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | avahi | 0.6.32~rc+dfsg-1ubuntu2.3+esm1 | USN-5008-2 |
| Ubuntu Pro 14.04 LTS | avahi | 0.6.31-4ubuntu1.3+esm1 | USN-5008-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | avahi +9 | 0.8-15.el9 | RHSA-2023:6707 |
| RHEL 8 | avahi +16 | 0.7-21.el8_9.1 | RHSA-2023:7836 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.8 EUS | avahi +15 | 0.7-20.el8_8.4 | RHSA-2024:0576 |
| RHEL 8.6 EUS | avahi +15 | 0.7-20.el8_6.3 | RHSA-2024:0418 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | avahi +9 | 0.8-15.el9 | ALSA-2023:6707 |
| AlmaLinux 8 | avahi +16 | 0.7-21.el8_9.1 | ALSA-2023:7836 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | avahi | 0.7-21.el8_9.1 | RLSA-2023:7836 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-1 |
| SLES 15 SP2 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-1 |
| SLES 15 SP1 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SLES 15 | avahi +1 | 0.6.32-5.13.1 | SUSE-SU-2021:1845-1 |
| SLES 12 SP5 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SLES 12 SP3 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SLES 12 SP2 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SLES for SAP 15 SP1 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SLES for SAP 15 | avahi +1 | 0.6.32-5.13.1 | SUSE-SU-2021:1845-1 |
| SLES for SAP 12 SP5 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-1 |
| SLES for SAP 12 SP4 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SLES for SAP 12 SP3 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SLE HPC 15 SP1 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SLE HPC 15 | avahi +1 | 0.6.32-5.13.1 | SUSE-SU-2021:1845-1 |
| SUSE OpenStack Cloud Crowbar 9 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SUSE OpenStack Cloud Crowbar 8 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SUSE OpenStack Cloud 9 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SUSE OpenStack Cloud 8 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SUSE Manager Server 4.0 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SUSE Manager Retail Branch Server 4.0 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SUSE Manager Proxy 4.0 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
| SUSE HPE Helion OpenStack 8 | avahi +1 | 0.6.32-32.15.1 | SUSE-SU-2021:1494-2 |
| SUSE Enterprise Storage 6 | avahi +1 | 0.7-3.9.1 | SUSE-SU-2021:1493-2 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.8-7.2 | openSUSE-SU-2024:10643-1 |
| openSUSE Leap 15.3 | avahi +1 | 0.6.32-5.13.1 | openSUSE-SU-2021:1845-1 |
| openSUSE Leap 15.2 | avahi +3 | 0.7-lp152.3.9.1 | openSUSE-SU-2021:0694-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | avahi | 0.8-r4 | — |
| Alpine v3.23 | avahi | 0.8-r4 | — |
| Alpine v3.22 | avahi | 0.8-r4 | — |
| Alpine v3.21 | avahi | 0.8-r4 | — |
| Alpine v3.20 | avahi | 0.8-r4 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | avahi | 0.8-r4 | — |
| Alpine v3.18 | avahi | 0.8-r4 | — |
| Alpine v3.17 | avahi | 0.8-r4 | — |
| Alpine v3.16 | avahi | 0.8-r4 | — |
| Alpine v3.15 | avahi | 0.8-r4 | — |
| Alpine v3.14 | avahi | 0.8-r4 | — |
| Alpine v3.13 | avahi | 0.8-r3 | — |
| Alpine v3.12 | avahi | 0.8-r1 | — |
| Alpine v3.11 | avahi | 0.8-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | avahi +21 | 0.6.31-20.amzn2.0.3 | ALAS2-2023-2372 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | avahi | 0.8-1 | — |
| Azure Linux 2 (CBL-Mariner) | avahi | 0.8-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | avahi +9 | 0.8-15.el9 | ELSA-2023-6707 |
| Oracle Linux 8 | avahi +16 | 0.7-21.el8_9.1 | ELSA-2023-7836 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | avahi | 0.8-r1 | — |
Advisories 23
- ALSA-2023:6707 Moderate: avahi security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:7836 Moderate: avahi security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:0418 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Sep 14, 2026
- RHSA-2024:0576 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Sep 14, 2026
- RHSA-2023:7836 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Sep 14, 2026
- USN-5008-2 avahi vulnerability Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2023:6707 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-5008-1 avahi vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-3466-1 avahi - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3047-1 avahi - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:7836 Moderate: avahi security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2021:1493-2 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1494-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0694-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1845-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1494-2 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1493-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10643-1 avahi-0.8-7.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1845-1 Security update for avahi SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2022-0143 avahi: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jan 30, 2024
- ELSA-2023-7836 Moderate: avahi security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 15, 2023
- ALAS2-2023-2372 Moderate: avahi security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 4, 2023
- ELSA-2023-6707 Moderate: avahi security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 11, 2023