Description
A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | avahi | 0.8-5 | — |
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 | 0.8-6 | — |
| Debian 13 | avahi | 0.8-6 | — |
| Debian 12 | avahi | 0.8-6 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | avahi | 0.8-5ubuntu4 | — |
| 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 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | avahi +9 | 0.8-15.el9 | RHSA-2023:6707 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | avahi +9 | 0.8-15.el9 | ALSA-2023:6707 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.8-7.2 | openSUSE-SU-2024:10643-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | avahi | 0.8-r5 | — |
| Alpine v3.23 | avahi | 0.8-r5 | — |
| Alpine v3.22 | avahi | 0.8-r5 | — |
| Alpine v3.21 | avahi | 0.8-r5 | — |
| Alpine v3.20 | avahi | 0.8-r5 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | avahi | 0.8-r5 | — |
| Alpine v3.18 | avahi | 0.8-r5 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | avahi | 0.8-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | avahi +9 | 0.8-15.el9 | ELSA-2023-6707 |
Advisories 5
- ALSA-2023:6707 Moderate: avahi security update AlmaLinux Security Advisories · Oct 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
- openSUSE-SU-2024:10643-1 avahi-0.8-7.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2023-6707 Moderate: avahi security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 11, 2023