Buffer Overflow Affecting dhcp-libs package, versions *


Severity

Recommended
low

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.4% (33rd percentile)

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  • Snyk IDSNYK-RHEL7-DHCPLIBS-18544139
  • published5 Aug 2026
  • disclosed28 Jul 2026

Introduced: 28 Jul 2026

NewCVE-2026-18103  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 dhcp-libs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dhcp-libs package and not the dhcp-libs package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A flaw was found in dhcp-server. A remote attacker with network access to the OMAPI (Open Management Application Programming Interface) port, especially if not secured with TSIG (Transaction Signature) key authentication, could send a specially crafted lease creation request. This request, containing an overly long InfiniBand MAC address, triggers a buffer overflow in the print_hw_addr() function. Successful exploitation leads to a persistent denial of service (DoS), causing the dhcpd service to crash and preventing it from restarting without manual intervention.

CVSS Base Scores

version 3.1