Description
A flaw was found in dnsmasq. When DHCP leasequery is enabled without listing allowed source addresses, the server does not check who sent the query. A host on the local network can request DHCP lease records and learn assigned addresses, MAC addresses, hostnames, and related lease metadata. The feature is off unless an administrator turns it on.
Published: 2026-10-29
Score: 4.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

Vendor Workaround

The following measures reduce risk: 1. Prefer --leasequery=<addr>[/prefix] so only designated relays may query. 2. If leasequery is not needed, do not enable it. It is off by default. 3. If unrestricted leasequery is required, use firewall rules to limit which hosts can send DHCP packets to dnsmasq.

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History

Thu, 29 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in dnsmasq. When DHCP leasequery is enabled without listing allowed source addresses, the server does not check who sent the query. A host on the local network can request DHCP lease records and learn assigned addresses, MAC addresses, hostnames, and related lease metadata. The feature is off unless an administrator turns it on.
Title Dnsmasq: dnsmasq: --leasequery without address argument applies no source address check
First Time appeared Redhat
Redhat ceph Storage
Redhat enterprise Linux
Redhat openshift
Redhat openstack
Weaknesses CWE-862
CPEs cpe:/a:redhat:ceph_storage:9
cpe:/a:redhat:openshift:4
cpe:/a:redhat:openstack:13
cpe:/a:redhat:openstack:18.0
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat ceph Storage
Redhat enterprise Linux
Redhat openshift
Redhat openstack
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Subscriptions

Redhat Ceph Storage Enterprise Linux Openshift Openstack
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-29T13:13:23.430Z

Reserved: 2026-09-17T14:35:34.562Z

Link: CVE-2026-93010

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-29T14:18:00.530

Modified: 2026-10-29T14:18:00.640

Link: CVE-2026-93010

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses