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CVE-2026-24401

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:46102feb640bfc6cd2abbc05422df714f53658d8846e56166e11441c76a35bb5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"avahi","vendor":"avahi","versions":[{"status":"affected","version":"< 78eab31128479f06e30beb8c1cbf99dd921e2524"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524","tags":["x_refsource_MISC"],"url":"https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/references/2
{"name":"https://github.com/avahi/avahi/issues/501","tags":["x_refsource_MISC"],"url":"https://github.com/avahi/avahi/issues/501"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/references/1
{"name":"https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef1259ecda377a0be67636b870a6f8c70a123e3299b3043a4f8299d5bf10c3a4 · sha256:e430367d4585bff6… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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