CVE-2026-24401

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Source
https://cve.org/CVERecord?id=CVE-2026-24401
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-24401.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-24401
Aliases
  • GHSA-h4vp-5m8j-f6w3
Downstream
Related
Published
2026-01-24T01:25:02.294Z
Modified
2026-02-16T10:30:20.019120Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Avahi has Uncontrolled Recursion in lookup_handle_cname function
Details

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 lookuphandlecname function, leading to stack exhaustion. The vulnerability affects record browsers where AVAHILOOKUPUSE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.

Database specific 
{
    "cwe_ids": [
        "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24401.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/avahi/avahi

Affected ranges

Type
GIT
Repo
https://github.com/avahi/avahi
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
78eab31128479f06e30beb8c1cbf99dd921e2524

Affected versions

0.*
0.6.32-rc
v0.*
v0.6.23
v0.6.24
v0.6.25
v0.6.26
v0.6.27
v0.6.28
v0.6.29
v0.6.30
v0.6.31
v0.6.32
v0.7
v0.8
v0.9-rc1
v0.9-rc2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-24401.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "signature_type": "Function",
        "digest": {
            "length": 724.0,
            "function_hash": "332737092712039648650165003545039931030"
        },
        "signature_version": "v1",
        "source": "https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524",
        "id": "CVE-2026-24401-173bd870",
        "target": {
            "file": "avahi-core/browse.c",
            "function": "lookup_handle_cname"
        }
    },
    {
        "deprecated": false,
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "151505114680226689991009913718028681377",
                "156292945866089260300898979064104515909",
                "102594860459434896414600153339778576587",
                "271740318055916461206324138873014224655",
                "212433022854709265375621083468558640536",
                "15743829998157019946019777875182439863"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "source": "https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524",
        "id": "CVE-2026-24401-2058ab72",
        "target": {
            "file": "avahi-core/browse.c"
        }
    }
]