CVE-2026-18103
Last modified
CVE-2026-18103 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 6 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat Enterprise Linux 8 | All versions |
| Red Hat | Red Hat Enterprise Linux 9 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-18103?
How severe is CVE-2026-18103?
How do I fix CVE-2026-18103?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-18098IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…8.1
- CVE-2026-18099IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…5.4
- CVE-2026-1810A vulnerability was detected in bolo-blog bolo-solo up to 2.…8.8
- CVE-2026-18100The MetForm – Contact Form, Survey, Quiz, & Custom Form Buil…6.4
- CVE-2026-18101IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to…8.8
- CVE-2026-18102IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…4.3
- CVE-2026-18104IBM Db2 Mirror for i 7.6, 7.5, and 7.4 could allow a local a…3.3
- CVE-2026-18106IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…4.3
- CVE-2026-18107A flaw was found in CRIU's handling of restartable sequences…7.8
- CVE-2026-18108Net::SAML2 versions before 0.86 for Perl allow authenticatio…9.8
- CVE-2026-18109The W3 Total Cache plugin for WordPress is vulnerable to Sto…7.2
- CVE-2026-1811A flaw has been found in bolo-blog bolo-solo up to 2.6.4. Th…8.8
Are you affected by CVE-2026-18103?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST