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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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://access.redhat.com/security/cve/CVE-2026-3238
https://bugzilla.redhat.com/show_bug.cgi?id=2486176
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3238.json

Configurations

No configuration.

History

30 Jun 2026, 03:19

Type	Values Removed	Values Added
References		() https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3238.json -
References	~~() https://access.redhat.com/security/cve/CVE-2026-3238 -~~	() https://access.redhat.com/security/cve/CVE-2026-3238 -
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2486176 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2486176 -

08 Jun 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-08 09:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-3238

Mitre link : CVE-2026-3238

CVE.ORG link : CVE-2026-3238

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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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."}], "lastModified": "2026-07-15T02:20:59.073", "sourceIdentifier": "secalert@redhat.com"}