Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| avahi | avahi | < 0.9-rc4 | — |
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 | No fix yet | — |
| Debian 13 | avahi | No fix yet | — |
| Debian 12 | avahi | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | avahi | 0.8-18ubuntu1.1 | — |
| Ubuntu 25.10 | avahi | 0.8-16ubuntu3.2 | — |
| Ubuntu 24.04 LTS | avahi | 0.8-13ubuntu6.2 | — |
| Ubuntu 22.04 LTS | avahi | 0.8-5ubuntu5.5 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | avahi | 0.7-4ubuntu7.3+esm2 | — |
| Ubuntu Pro 18.04 LTS | avahi | 0.7-3.1ubuntu1.3+esm4 | — |
| Ubuntu Pro 16.04 LTS | avahi | 0.6.32~rc+dfsg-1ubuntu2.3+esm5 | — |
| Ubuntu Pro 14.04 LTS | avahi | 0.6.31-4ubuntu1.3+esm5 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | avahi +26 | 0.9~rc4-0.1.hum1 | RHSA-2026:11316 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | avahi +1 | 0.8-160000.5.1 | SUSE-SU-2026:22338-1 |
| SLES 16.0 | avahi +1 | 0.8-160000.5.1 | SUSE-SU-2026:22338-1 |
| SLE Micro 6.2 | avahi | 0.8-160000.5.1 | SUSE-SU-2026:22258-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.5 | avahi | 0.8-150400.7.31.2 | SUSE-SU-2026:2311-1 |
| SLE Micro 5.4 | avahi | 0.8-150400.7.31.2 | SUSE-SU-2026:2311-1 |
| SLE Micro 5.3 | avahi | 0.8-150400.7.31.2 | SUSE-SU-2026:2311-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.8-43.1 | openSUSE-SU-2026:10670-1 |
| openSUSE Leap 16.0 | avahi +2 | 0.8-160000.5.1 | openSUSE-SU-2026:21014-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | avahi | 0.8-r26 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | avahi | 0.8-8 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | avahi +1 | 0.9_rc4-r0 | — |
Advisories 7
- RHSA-2026:11316 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- SUSE-SU-2026:22338-1 Security update for avahi SUSE / openSUSE Security Updates · Jul 2, 2026
- WID-SEC-2026-0975 avahi: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jul 1, 2026
- openSUSE-SU-2026:21014-1 Security update for avahi SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22258-1 Security update for avahi SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2311-1 Security update for avahi SUSE / openSUSE Security Updates · Jun 10, 2026
- openSUSE-SU-2026:10670-1 avahi-0.8-43.1 on GA media SUSE / openSUSE Security Updates · May 5, 2026