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Linux Distros Unpatched Vulnerability : CVE-2026-34933

medium Nessus Plugin ID 305007

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4.
 (CVE-2026-34933)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-34933

https://security-tracker.debian.org/tracker/CVE-2026-34933

https://ubuntu.com/security/CVE-2026-34933

Plugin Details

Severity: Medium

ID: 305007

File Name: unpatched_CVE_2026_34933.nasl

Version: 1.4

Type: Local

Agent: unix

Family: Misc.

Published: 4/5/2026

Updated: 4/14/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.9

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

CVSS Score Source: CVE-2026-34933

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:python3-avahi, p-cpe:/a:redhat:enterprise_linux:avahi-dnsconfd, p-cpe:/a:centos:centos:avahi-compat-libdns_sd-devel, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:redhat:enterprise_linux:avahi-libs, p-cpe:/a:redhat:enterprise_linux:avahi-qt3, p-cpe:/a:redhat:enterprise_linux:avahi-qt3-devel, cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:avahi-tools, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:centos:centos:avahi-qt4-devel, p-cpe:/a:redhat:enterprise_linux:avahi-ui-tools, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:avahi-gobject-devel, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl-devel, p-cpe:/a:redhat:enterprise_linux:avahi-devel, p-cpe:/a:redhat:enterprise_linux:avahi-glib, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:avahi-ui-gtk3, p-cpe:/a:centos:centos:avahi-qt3, p-cpe:/a:redhat:enterprise_linux:avahi-qt4, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:avahi-ui-gtk3, p-cpe:/a:redhat:enterprise_linux:avahi-autoipd, p-cpe:/a:redhat:enterprise_linux:avahi-ui, p-cpe:/a:redhat:enterprise_linux:avahi-ui-devel, p-cpe:/a:centos:centos:avahi-ui, p-cpe:/a:redhat:enterprise_linux:avahi-glib-devel, p-cpe:/a:debian:debian_linux:avahi, p-cpe:/a:canonical:ubuntu_linux:avahi, p-cpe:/a:centos:centos:avahi-compat-libdns_sd, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:avahi-tools, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd-devel, p-cpe:/a:centos:centos:avahi-gobject, p-cpe:/a:centos:centos:avahi-qt4, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:avahi-autoipd, p-cpe:/a:centos:centos:avahi-glib, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:avahi-gobject, p-cpe:/a:centos:centos:avahi, p-cpe:/a:redhat:enterprise_linux:avahi-qt4-devel, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:centos:centos:avahi-compat-howl, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl, p-cpe:/a:centos:centos:avahi-dnsconfd, p-cpe:/a:centos:centos:avahi-ui-devel, p-cpe:/a:centos:centos:avahi-libs, p-cpe:/a:centos:centos:python3-avahi, p-cpe:/a:centos:centos:avahi-ui-tools, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd, p-cpe:/a:centos:centos:avahi-devel, p-cpe:/a:centos:centos:avahi-qt3-devel, p-cpe:/a:centos:centos:avahi-glib-devel, p-cpe:/a:centos:centos:avahi-compat-howl-devel, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:redhat:enterprise_linux:6, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:avahi-gobject-devel, p-cpe:/a:redhat:enterprise_linux:avahi

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 4/3/2026

Reference Information

CVE: CVE-2026-34933