openSUSE 16 Security Update : dnsmasq (openSUSE-SU-2026:21192-1)

high Nessus Plugin ID 325045

Synopsis

The remote openSUSE host is missing one or more security updates.

Description

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21192-1 advisory.

This update for dnsmasq fixes the following issues

Update to 2.93:

- CVE-2026-12725: heap buffer overflow in `log_query()` when logging unsupported DS/DNSKEY replies (bsc#1268764).

Changes for dnsmasq:

* CVE-2026-12725, bsc#1268764: Heap buffer overflow in `log_query()` when logging unsupported DS/DNSKEY replies.
* Fix a corner-case in DNSSEC validation with wildcards.
* Fix DNSSEC failure with spurious RRSIGs.
* Fix DNSSEC fail with CNAME replies to DS queries.
* Fix regression in 2.92 release which broke DHCPv6 when a DHCP relay is in use.
* Modify the inotify implementation so that inotify watches are only created after dnsmasq has changed permissions and userid.
* CVE-2026-2291: Rework storage allocation for domain names.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected dnsmasq and / or dnsmasq-utils packages.

Plugin Details

Severity: High

ID: 325045

File Name: openSUSE-2026-21192-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/3/2026

Updated: 7/3/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

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-2026-6507

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

CVSS Score Source: CVE-2026-2291

Vulnerability Information

CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:dnsmasq, p-cpe:/a:novell:opensuse:dnsmasq-utils

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 4/17/2026

Reference Information

CVE: CVE-2026-12725, CVE-2026-2291, CVE-2026-6507

IAVA: 2026-A-0450

Detections

Analytics