CVE-2026-3238
7.5
HIGH
CVSS 3.1
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.
How to fix CVE-2026-3238
To remediate CVE-2026-3238, upgrade the affected package to a fixed version below.
- Alpine/samba—upgrade to 4.22.10-r0 or later
- Debian/samba—no fix listed
Is CVE-2026-3238 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-3238.
Affected packages (2)
- from 0, < 4.22.10-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| nvd | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |