CVE-2026-3238 HIGH

CVE-2026-3238: Samba: denial of service against ad dc wins server

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-476
Published June 8, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 8, 2026 CVE published
June 30, 2026 Record updated