MEDIUM 4.9 NVD
CVE-2026-18103
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
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.
References
- https://access.redhat.com/security/cve/CVE-2026-18103
- https://bugzilla.redhat.com/show_bug.cgi?id=2508081
This medium severity vulnerability with a CVSS score of 4.9 was published on 2026-08-05 via NVD.
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