What’s Vulnerable › Vulnerabilities

CVE-2025-68471: Avahi has a reachable assertion in lookup_start

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-12 · updated 2026-06-17
• Weakness: CWE-617

Description

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 2 unsolicited announcements with CNAME resource records 2 seconds apart.

Affected products

• avahi: before 0.9; 0.9-rc1 — fixed in 0.9

How to fix

Upgrade to a fixed version: avahi 0.9. Check the vendor advisory for mitigations.

References

• https://github.com/avahi/avahi/commit/9c6eb53bf2e290aed84b1f207e3ce35c54cc0aa1
• https://github.com/avahi/avahi/issues/678
• https://github.com/avahi/avahi/security/advisories/GHSA-56rf-42xr-qmmg

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