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.

INFO

Published Date :

2026-01-24T01:25:02.294Z

Last Modified :

2026-01-26T16:17:24.487Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-24401 vulnerability.

Vendors Products
Avahi
  • Avahi
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-24401.

URL Resource
https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524 cve-icon cve-icon cve-icon
https://github.com/avahi/avahi/issues/501 cve-icon cve-icon cve-icon
https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-24401 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-24401 cve-icon
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