Reachable assertion in Avahi - CVE-2025-68468
Published: April 24, 2026
Vulnerability identifier: #VU127432
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-68468
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: avahi.org
Affected software:
Avahi
Avahi
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to reachable assertion in lookup_multicast_callback when processing unsolicited multicast DNS announcements containing CNAME resource records that point to records with short TTLs. A remote attacker can send a specially crafted announcement to cause a denial of service.
User interaction is required because exploitation depends on a record browser browsing for the targeted service type.
How to mitigate CVE-2025-68468
Install security update from vendor's website.