Vulnerabilities CVE-2026-3238

CVE-2026-3238

High

Open

TLP:CLEAR

Samba: denial of service against ad dc wins server

NVD CVE.org

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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.

Details

CVSS Score: 7.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: Jun 8, 2026
Last Modified: Aug 21, 2026

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