Avahi: avahi wide-area dns predictable transaction ids
Priority LOW 31CWE-334Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Partial Red Hat: 3 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00726 54th percentileScored 2026-11-07
Fix Partial avahi (avahi): 0.9-rc2Red Hat: 1 advisoryRed Hat: 3 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| avahi | avahi | before 0.9-rc2 | 0.9-rc2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 0.8-22.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 0.8-22.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
- avahi Vendoravahi Affected before 0.9-rc2 Fixed in 0.9-rc2 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 0.8-22.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 0.8-22.el9_6 Patch available CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::crb | 9 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:9::baseos | 9 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8 | 8 | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::crb Versions 9 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:9::baseos Versions 9 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
Remediation
- Fix · CNA avahi (avahi) Fixed in 0.9-rc2
Red Hat 1 advisory
- RHSA-2025:7437 Released 2025-05-13 · Red Hat rating Moderateavahi security update
- Red Hat Enterprise Linux AppStream (v. 9) avahi-autoipd-0.8-22.el9_6, avahi-glib-0.8-22.el9_6, avahi-tools-0.8-22.el9_6
- Red Hat Enterprise Linux BaseOS (v. 9) avahi-0.8-22.el9_6, avahi-libs-0.8-22.el9_6
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) avahi-compat-howl-0.8-22.el9_6, avahi-compat-howl-devel-0.8-22.el9_6, avahi-compat-libdns_sd-0.8-22.el9_6 +5
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:7437 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:7437 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2025:7437 |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-52616
- 2026-10-21 Affected versions changed · CNA
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 Affected versions changed · CNA
- 2026-10-22 Affected versions changed · Red Hat
- 2026-10-28 Fix available: [email protected] · CNA
References
More avahi vulnerabilities
- TI-2026-27157 Avahi: Reachable assertion in `transport_flags_from_domain()` via conflicting publish flags crashes avahi-daemon CVSS 3.1MEDIUM 5.5
- TI-2025-37060 Avahi: simple protocol server ignores accepts unlimited connections and logs failures without limit CVSS 3.1MEDIUM 5.5
- TI-2008-04834 The originates_from_local_legacy_unicast_socket function (avahi-core/server.c) in… CVSS 2.0MEDIUM 5.0
- TI-2017-04303 avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast… CVSS 3.1CRITICAL 9.1
- TI-2011-00862 avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows remote attackers to… CVSS 2.0MEDIUM 5.0
- TI-2009-00723 The originates_from_local_legacy_unicast_socket function in avahi-core/server.c in… CVSS 2.0HIGH 7.8
Sources
- CVE-2024-52616 · CVE Program
- CVE-2024-52616 · NVD
- FIRST EPSS
- CVE-2024-52616 · Red Hat security data · CC BY 4.0
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