Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-3238?
CVE-2026-3238 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2026-3238?
CVE-2026-3238 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3238?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.