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Fencer Vulns
medium 4.3

CVE-2026-93010 json

Dnsmasq: dnsmasq: --leasequery without address argument applies no source address check

published 2026-10-29 10 d ago modified 2026-11-06 2 d ago also EUVD-2026-112825

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-93010 updated cvss 4.3

dnsmasq: dnsmasq: --leasequery without address argument applies no source address check

  • Red Hat Ceph Storage 9 rhceph/alloy-rhel10 Red Hat Enterprise Linux 6 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 7 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 8 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 9 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 10 dnsmasq
    +4 more products
    Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9, openshift4/ose-baremetal-runtimecfg-rhel8, openshift4/ose-baremetal-runtimecfg-rhel9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9, openshift5/ose-baremetal-runtimecfg-rhel9 Red Hat OpenStack Platform 13 (Queens) dnsmasq-utils Red Hat OpenStack Platform 18.0 rhoso-operators/infra-rhel9-operator
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Red Hat Red Hat Ceph Storage 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5
  • Red Hat Red Hat OpenStack Platform 13 (Queens)
  • Red Hat Red Hat OpenStack Platform 18.0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.