Local Network Vulnerability in dnsmasq Affecting DHCP Lease Queries
CVE-2026-93010

4.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Ceph Storage 9
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
29 October 2026

What is CVE-2026-93010?

A flaw in dnsmasq allows unauthorized access to DHCP lease records when the DHCP leasequery feature is enabled without proper source address restrictions. This oversight permits local network hosts to retrieve sensitive DHCP lease metadata, including assigned IP addresses, MAC addresses, and hostnames. The feature remains disabled by default and requires deliberate activation by administrators, which underscores the importance of maintaining secure configurations in network services.

References

https://access.redhat.com/security/cve/CVE-2026-93010
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2536081
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.
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