TI-2025-41998 Aliases CVE-2025-68468

Avahi has a reachable assertion in lookup_multicast_callback

LOW 29CWE-617Published 2026-01-12 · Updated 2026-01-12

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 1 fixed, 6 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending unsolicited announcements containing CNAME resource records pointing it to resource records with short TTLs. As soon as they expire avahi-daemon crashes.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0038 32nd percentileScored 2026-11-07

Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
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	up to 0.9-rc2	—	No fix listed	CNA

avahi Vendoravahi Affected up to 0.9-rc2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:avahi:avahi::::::::	before 0.9	Vulnerable	avahi
cpe:2.3:a:avahi:avahi:0.9:rc1::::::	0.9 rc1	Vulnerable	avahi

cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* Versions before 0.9 Vulnerable ·avahi
cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:* Versions 0.9 rc1 Vulnerable ·avahi

Remediation

Red Hat 1 advisory

RHSA-2026:11316 Released 2026-04-28 · Red Hat rating Moderate
Red Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images avahi-0.9~rc4-0.1.hum1@aarch64, avahi-0.9~rc4-0.1.hum1@src, avahi-0.9~rc4-0.1.hum1@x86_64 +47

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat Hardened Images	Fixed	RHSA-2026:11316

Timeline

2026-10-02 Threatist record created from CVE-2025-68468

References

Patch 2

Advisory 1

https://github.com/avahi/avahi/security/advisories/GHSA-cp79-r4x9-vf52

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-2021-08399 avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root… CVSS 3.1HIGH 7.8

See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences