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Chainguard: multiple avahi packages: security update to 0.9_rc3-r0

medium Tenable Cloud Security Plugin ID 476232

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-24401)

Solution

Update the avahi library and its related packages to version 0.9_rc3-r0 or later.

Plugin Details

Severity: Medium

ID: 476232

Version: Revision 1.1

Type: Local

Published: 10/20/2026

Updated: 10/20/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.93

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-24401

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 1/24/2026

Reference Information

CVE: CVE-2026-24401