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CVE-2026-3238

Samba: denial of service against ad dc wins server

Published: Jun 8, 2026Updated: Jul 23, 2026 Sources: CVE List NVD BDUCWE-476
7.5HIGH
NVD MITRE
EPSS Score
2.7%
Top 15.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-476

Affected Products

Red Hat
commercial·US
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
Amazon.com Inc.
commercial·USaka amazon, amazon web services
Amazon Linux 2Mixed
Operating Systems / linux-distro
Canonical Ltd.
commercial·GBaka canonical
UbuntuOn-premOS
Operating Systems / linux-distro
Samba Team
oss-project·AUaka samba
SambaLibraryLibrary
OSS Libraries / generic-library
and 4 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://alas.aws.amazon.com/AL2/ALAS2-2026-3238.html
alas.aws.amazon.com
https://lists.debian.org/debian-security-announce/2026/msg00208.html
lists.debian.org
https://ubuntu.com/security/notices/USN-8306-1
ubuntu.com
and 5 more references View all →

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