Uncontrolled Recursion in Avahi - CVE-2024-2699
Published: April 24, 2026
Vulnerability identifier: #VU127434
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-2024-2699
CWE-ID: CWE-674
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 uncontrolled recursion in lookup_handle_cname when processing unsolicited announcements with recursive CNAME resource records. A remote attacker can send a specially crafted multicast DNS announcement to cause a denial of service.
User interaction is required, and the issue affects record browsers where AVAHI_LOOKUP_USE_MULTICAST is set explicitly.
How to mitigate CVE-2024-2699
Install security update from vendor's website.