Description
A flaw was found in the Avahi-daemon, where it initializes DNS transaction IDs randomly only once at startup, incrementing them sequentially after that. This predictable behavior facilitates DNS spoofing attacks, allowing attackers to guess transaction IDs.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| avahi | avahi | < 0.9-rc2 | 0.9-rc2 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
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 | 0.8-18 | — |
| Debian 13 | avahi | No fix yet | — |
| Debian 12 | avahi | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | avahi | No fix yet | — |
| Ubuntu 24.04 LTS | avahi | No fix yet | — |
| Ubuntu 22.04 LTS | avahi | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | avahi | No fix yet | — |
| Ubuntu Pro 18.04 LTS | avahi | No fix yet | — |
| Ubuntu Pro 16.04 LTS | avahi | No fix yet | — |
| Ubuntu Pro 14.04 LTS | avahi | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | avahi +12 | 0.8-22.el9_6 | RHSA-2025:7437 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | avahi +12 | 0.8-22.el9_6 | ALSA-2025:7437 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | avahi | 0.8-22.el9_6 | RLSA-2025:7437 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | avahi +1 | 0.8-150600.15.6.1 | SUSE-SU-2024:4196-1 |
| SLES 15 SP5 | avahi +1 | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
| SLES 12 SP5 | avahi +1 | 0.6.32-32.30.1 | SUSE-SU-2024:4282-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | avahi | 0.8-slfo.1.1_2.1 | SUSE-SU-2025:20308-1 |
| SLE Micro 6.0 | avahi | 0.8-6.1 | SUSE-SU-2025:20103-1 |
| SLE Micro 5.5 | avahi | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
| SLE Micro 5.4 | avahi | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
| SLE Micro 5.3 | avahi | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
| SLE Micro 5.2 | avahi | 0.7-150100.3.40.1 | SUSE-SU-2024:4225-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.8-37.1 | openSUSE-SU-2024:14538-1 |
| openSUSE Leap 15.6 | avahi +2 | 0.8-150600.15.6.1 | SUSE-SU-2024:4196-1 |
| openSUSE Leap 15.5 | avahi +2 | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | avahi | 0.8-150400.7.20.1 | SUSE-SU-2024:4386-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | avahi | 0.8-r21 | — |
| Alpine v3.23 | avahi | 0.8-r21 | — |
| Alpine v3.22 | avahi | 0.8-r21 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | avahi +15 | 0.8-14.amzn2023.0.14 | ALAS2023-2024-771 |
| Amazon Linux 2 | avahi +21 | 0.6.31-20.amzn2.0.7 | ALAS2-2024-2704 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | avahi | 0.8-5 | — |
| Azure Linux 2 (CBL-Mariner) | avahi | 0.8-4 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | avahi +12 | 0.8-22.el9_6 | ELSA-2025-7437 |
Advisories 14
- ALSA-2025:7437 Moderate: avahi security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:7437 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- SUSE-SU-2025:20308-1 Security update for avahi SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20103-1 Security update for avahi SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2024-3474 avahi: Mehrere Schwachstellen ermöglichen Manipulation von Dateien BSI CERT-Bund (WID) · Mar 1, 2026
- SUSE-SU-2024:4282-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4386-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4196-1 Security update for avahi SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2025:7437 Moderate: avahi security update Rocky Linux Security Advisories · Oct 4, 2025
- ELSA-2025-7437 Moderate: avahi security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 22, 2025
- openSUSE-SU-2024:14538-1 avahi-0.8-37.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2024:4225-1 Security update for avahi SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2024-2704 Moderate: avahi security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 19, 2024
- ALAS2023-2024-771 Moderate: avahi security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Dec 16, 2024
References
- RHSA-2025:7437 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2024-52616 vdb-entry
- RHBZ#2326429 issue-tracking
- https://github.com/avahi/avahi/pull/577