CVE-2026-3238

A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the WINS service using specially crafted UDP packets.

Score

CVSS 3.1 7.5 High

Status

Awaiting Analysis - secalert@redhat.com

Published

2026-06-08

Last modified

2026-09-01

Weaknesses

CWE-476

Affected products

• Enterprise Linux (Redhat)
• Openshift (Redhat)

References

• https://access.redhat.com/security/cve/CVE-2026-3238
• https://bugzilla.redhat.com/show_bug.cgi?id=2486176
• https://www.samba.org/samba/security/CVE-2026-3238.html
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3238.json