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.
References
| Link | Resource |
|---|---|
| https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524 | Patch |
| https://github.com/avahi/avahi/issues/501 | Issue Tracking Patch |
| https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
12 Feb 2026, 15:58
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Avahi
Avahi avahi |
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| CPE | cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* cpe:2.3:a:avahi:avahi:0.9:rc2:*:*:*:*:*:* cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:* |
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| References | () https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524 - Patch | |
| References | () https://github.com/avahi/avahi/issues/501 - Issue Tracking, Patch | |
| References | () https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3 - Vendor Advisory |
24 Jan 2026, 02:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-24 02:15
Updated : 2026-02-12 15:58
NVD link : CVE-2026-24401
Mitre link : CVE-2026-24401
CVE.ORG link : CVE-2026-24401
JSON object : View
Products Affected
avahi
- avahi
CWE
CWE-674
Uncontrolled Recursion