CVE Database›Document archive›CVE-2023-32249

CVE-2023-32249

kernel: ksmbd: not allow guest user on multichannel

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 16, 2025

Updated · October 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: not allow guest user on multichannel

This patch return STATUS_NOT_SUPPORTED if binding session is guest.

Statement

This vulnerability is rated as Moderate impact because unauthorized session binding over multichannel SMB requires an established guest connection to trigger unexpected server states or denial of service. Red Hat Enterprise Linux does not compile or distribute the in-kernel ksmbd server module, providing SMB file sharing capabilities exclusively through user-space Samba services instead. Consequently, Red Hat Enterprise Linux is not affected by this flaw.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE not specified