CVE-2026-3238

high

Description

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.

References

https://www.samba.org/samba/security/CVE-2026-3238.html

https://bugzilla.redhat.com/show_bug.cgi?id=2486176

https://access.redhat.com/security/cve/CVE-2026-3238

Details

Source: Mitre, NVD

Published: 2026-06-08

Updated: 2026-06-08

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00075