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Affected Component
Analysis
avahi
Exploitable
Name
CVE-2026-24401
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 record browsers where AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.
CWEs
Published Date
Updated Date
Workaround
-
Analysis#
Vulnerability Ratings#
6.5
CVSSv31
6.5
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
avahi (buildroot:2025.02.x)
#
Title
Author
Resolve
1
core: fix uncontrolled recursion bug using a simple loop
Hugo Muis <198191869+friendlyhugo@users.noreply.github.com>
CVE-2026-24401
avahi (buildroot:master)
#
Title
Author
Resolve
1
core: fix uncontrolled recursion bug using a simple loop
Hugo Muis <198191869+friendlyhugo@users.noreply.github.com>
CVE-2026-24401