7.5highHigh
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.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness
- CWE-476
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-06-08
- Last modified
- 2026-09-01
- Sources
- NVD
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