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SUSE SLED15 / SLES15 Security Update : dnsmasq (SUSE-SU-2026:1934-1)

high Nessus Plugin ID 315254

Synopsis

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

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1934-1 advisory.

 This update for dnsmasq fixes the following issues

 Security issues:

 - CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001).
 - CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC validation (bsc#1265002).
 - CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6 implementation (bsc#1265003).
 - CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks (bsc#1265004).
 - CVE-2026-5172: buffer overflow in dnsmasq's extract_addresses() function (bsc#1265006).
 - CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to denial of service (bsc#1262487).

 Non security issues:

 - Updated to security release 2.92rel2.
 - aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812).
 - Drop rcFOO symlinks for CODE16 (jsc#PED-266).
 - libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934).

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 package.

See Also

https://bugzilla.suse.com/1247812

https://bugzilla.suse.com/1257934

https://bugzilla.suse.com/1258251

https://bugzilla.suse.com/1262487

https://bugzilla.suse.com/1265001

https://bugzilla.suse.com/1265002

https://bugzilla.suse.com/1265003

https://bugzilla.suse.com/1265004

https://bugzilla.suse.com/1265006

https://lists.suse.com/pipermail/sle-updates/2026-May/046549.html

https://www.suse.com/security/cve/CVE-2026-2291

https://www.suse.com/security/cve/CVE-2026-4890

https://www.suse.com/security/cve/CVE-2026-4891

https://www.suse.com/security/cve/CVE-2026-4892

https://www.suse.com/security/cve/CVE-2026-4893

https://www.suse.com/security/cve/CVE-2026-5172

https://www.suse.com/security/cve/CVE-2026-6507

Plugin Details

Severity: High

ID: 315254

File Name: suse_SU-2026-1934-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/19/2026

Updated: 5/19/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

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: 8.4

Temporal Score: 7.3

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

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

CVSS Score Source: CVE-2026-4892

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:dnsmasq, cpe:/o:novell:suse_linux:15

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: 5/18/2026

Vulnerability Publication Date: 4/17/2026

Reference Information

CVE: CVE-2026-2291, CVE-2026-4890, CVE-2026-4891, CVE-2026-4892, CVE-2026-4893, CVE-2026-5172, CVE-2026-6507

IAVA: 2026-A-0450

SuSE: SUSE-SU-2026:1934-1