CVE-2026-12725

Severity CVSS v4.0:

Pending analysis

Type:

CWE-122 Heap-based Buffer Overflow

Publication date:

22/06/2026

Last modified:

08/07/2026

Description

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and<br /> query logging are both enabled, logging of DS or DNSKEY replies containing<br /> unsupported algorithm or digest types can cause dnsmasq to write past the end<br /> of an internal logging buffer. A remote attacker able to supply such a DNS<br /> response may crash the dnsmasq process, resulting in denial of service.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.90

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:redhat:openshift_container_platform::::::::	4.0 (including)	4.22.1 (including)
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*
cpe:2.3:a:thekelleys:dnsmasq::::::::		2.93 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-12725

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools