DEBIAN-CVE-2026-24401

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Source
https://security-tracker.debian.org/tracker/CVE-2026-24401
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24401.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-24401
Upstream
Published
2026-01-24T02:15:48.760Z
Modified
2026-02-04T06:30:33.110106Z
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
[none]
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.

References

Affected packages

Debian:11 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.8-5
0.8-5+deb11u1
0.8-5+deb11u2
0.8-5+deb11u3
0.8-6
0.8-7
0.8-8
0.8-9
0.8-10
0.8-11
0.8-12
0.8-13
0.8-14
0.8-15
0.8-16
0.8-17
0.8-18

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24401.json"

Debian:12 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.8-10
0.8-10+deb12u1
0.8-11
0.8-12
0.8-13
0.8-14
0.8-15
0.8-16
0.8-17
0.8-18

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24401.json"

Debian:13 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.8-16
0.8-17
0.8-18

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24401.json"

Debian:14 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8-18

Affected versions

0.*
0.8-16
0.8-17

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24401.json"