CVE-2026-3238

Description

unauthenticated udp packet crashes AD DC nbt server

Overview

State

—

Assigner (CNA)

—

CVSS severity

MEDIUM

CVSS score

5.0 / 10

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Effective score

5.0 / 10 MEDIUM source: CNA overview

CWE(s)

—

Reserved

—

Published

2026-05-27 00:00 UTC

Last updated

—

Source

https://www.rapid7.com/db/vulnerabilities/debian-cve-2026-3238/

Linked Threat

CVE-2026-3238 — CVE-2026-3238

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-06-08 09:16:30 UTC

NVD last modified

2026-07-23 07:10:00 UTC

NVD CVSS v3.1

7.5 / 10 HIGH source: secalert@redhat.com

NVD CVSS vector

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

Exploitability subscore

3.9 / 10

Impact subscore

3.6 / 10

EPSS score

0.0267 (probability of exploitation in next 30 days)

EPSS percentile

84.25% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD-assigned CWE(s): CWE-476 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-35033

Assigner

redhat

Published

Jun 8, 2026, 7:34:20 AM

Updated

Jul 15, 2026, 1:08:02 AM

EUVD base score (CVSS 3.1)

7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EUVD-reported EPSS

2.6700

Aliases

GHSA-gpff-px68-36rh

ENISA 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-3238 tenable:nvd.nist.gov
• https://www.first.org/epss/ tenable:www.first.org
• https://www.samba.org/samba/security/CVE-2026-3238.html tenable:www.samba.org
• https://bugzilla.redhat.com/show_bug.cgi?id=2486176 tenable:bugzilla.redhat.com
• https://access.redhat.com/security/cve/CVE-2026-3238 tenable:access.redhat.com
• https://attackerkb.com/topics/CVE-2026-3238 rapid7:attackerkb.com
• https://www.cve.org/CVERecord?id=CVE-2026-3238 rapid7:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Rapid7 — Solution
  rapid7

  ubuntu-upgrade-samba

  2026-06-04 09:02 UTC
• Rapid7 — Solution
  rapid7

  debian-upgrade-samba

  2026-06-04 08:54 UTC
• CVE-2026-3238 - Vulnerability Details - OpenCVE
  web:app.opencve.io

  Affected Systems The vulnerability affects Red Hat Enterprise Linux distributions 6 through 10 and the OpenShift Container Platform 4 when Samba is installed and configured to provide WINS service for Active Directory Domain Controllers. Any system running those distributions with the affected Samba version is vulnerable.

  2026-06-19 02:38 UTC
• Oracle CPU April 2026: Delayed RUs & First Analysis ¶
  web:oradba.ch

  On April 21, 2026 , Oracle released the Critical Patch Update (CPU) for April 2026 — 481 new security fixes across the entire Oracle product stack. For Oracle Database, this means another round of mandatory patching. What makes this quarter unusual: several key Release Updates, including 19.31 and 23.26.2, were not available on release day and are delayed by up to a week or more.

  2026-06-19 02:38 UTC
• Security Update Guide - Loading - Microsoft
  web:portal.msrc.microsoft.com

  The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

  2026-06-19 02:38 UTC
• CVE-2026-3238 - security-tracker.debian.org
  web:security-tracker.debian.org

  Vulnerable and fixed packages The table below lists information on source packages.

  2026-06-19 02:38 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-06-19 02:38 UTC
• May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

  2026-06-19 02:38 UTC
• Microsoft Technical Security Notifications
  web:www.microsoft.com

  Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

  2026-06-19 02:38 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-06-19 02:38 UTC
• Oracle Critical Security Patch Update Advisory - May 2026
  web:www.oracle.com

  This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.

  2026-06-19 02:38 UTC
• Patch Tuesday June 2026: Security Updates & CVE Analysis
  web:zecurit.com

  Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

  2026-06-19 02:38 UTC

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