NULL pointer dereference in Samba - CVE-2026-3238
Published: May 27, 2026
Vulnerability identifier: #VU132343
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-3238
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Samba
Affected software:
Samba
Samba
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the WINS server component when handling a crafted UDP packet. A remote attacker can send a crafted UDP packet to cause a denial of service.
The issue affects the WINS server component in the Active Directory Domain Controller code.
How to mitigate CVE-2026-3238
Install security update from vendor's website.