CVE-2026-24401 — Uncontrolled Recursion in Avahi
Severity
6.5MEDIUMNVD
EPSS
0.0%
top 86.80%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 24
Description
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to the same domain (e.g., "h.local" as a CNAME for "h.local"). This causes unbounded recursion in the lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects rec…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6
Affected Packages4 packages
Patches
🔴Vulnerability Details
1OSV▶
CVE-2026-24401: Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite↗2026-01-24