What is CVE-2026-18103?

CVE-2026-18103 is a medium-severity vulnerability in Red Hat Enterprise Linux 6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.9/10. Published 2026-08-05.

How severe is CVE-2026-18103?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Buffer overflow in Red Hat Enterprise Linux 6

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 secured with TSIG (Transaction Signature) key authentication, could send a spec…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18103?: CVE-2026-18103 is a medium-severity vulnerability in Red Hat Enterprise Linux 6, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.9/10. Published 2026-08-05.
How severe is CVE-2026-18103?: Medium severity. CVSS v3 base score is 4.9 out of 10.