Vulnerability · Published Oct 29, 2026 · Assigned by redhat
CVE-2026-93010Dnsmasq: dnsmasq: --leasequery without address argument applies no source address check
Medium 4.3
In plain English
A medium-severity missing authorization in Red Hat Ceph Storage 9 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 91.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | dnsmasq | no fix listed | DEBIAN-CVE-2026-93010 |
| Debian:13 | dnsmasq | no fix listed | DEBIAN-CVE-2026-93010 |
| Debian:14 | dnsmasq | no fix listed | DEBIAN-CVE-2026-93010 |
| Ubuntu:22.04:LTS | dnsmasq | no fix listed | UBUNTU-CVE-2026-93010 |
| Ubuntu:24.04:LTS | dnsmasq | no fix listed | UBUNTU-CVE-2026-93010 |
| Ubuntu:26.04:LTS | dnsmasq | no fix listed | UBUNTU-CVE-2026-93010 |
| Ubuntu:26.10 | dnsmasq | no fix listed | UBUNTU-CVE-2026-93010 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Ceph Storage 9 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | see references |
| Red Hat | Red Hat OpenStack Platform 18.0 | see references |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-93010 vdb-entry, x_refsource_REDHAT
- RHBZ#2536081 issue-tracking, x_refsource_REDHAT