Reachable assertion in Avahi - #VU127435
Published: April 24, 2026
Vulnerability identifier: #VU127435
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Adjecent network
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 service_browser_callback when processing unsolicited PTR resource records. A remote attacker can send specially crafted multicast DNS announcements to cause a denial of service.
The issue causes avahi-discover-standalone to abort due to an assertion failure.
Remediation
Install security update from vendor's website.