CVE-2026-12725

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

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-12725	Mitigation Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2490763	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:openshift_container_platform::::::::
	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:::::::*

Configuration 2 (hide)

cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-22 16:16

Updated : 2026-08-31 22:17

NVD link : CVE-2026-12725

Mitre link : CVE-2026-12725

CVE.ORG link : CVE-2026-12725

JSON object : View

Products Affected

redhat

enterprise_linux
openshift_container_platform

thekelleys

dnsmasq

CWE

CWE-122

Heap-based Buffer Overflow

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