---
id: CVE-2023-32249
title: |-
  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.
summary: |-
  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.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.15, < 5.15.112'
  - 'linux_kernel >= 5.16, < 6.1.28'
  - 'linux_kernel >= 6.2, < 6.2.15'
  - 'linux_kernel >= 6.3, < 6.3.2'
patched:
  - linux_kernel 6.3.2
published: '2025-08-16'
updated: '2026-08-15'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-32249'
references:
  - url: 'https://git.kernel.org/stable/c/088131b7b01099720a528a72005ff17868705d40'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1f0490586544455e5be698be2e6c30077b4ec461'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3353ab2df5f68dab7da8d5ebb427a2d265a1f2b2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4a98e859c4673013385a54084e0cd865695ca072'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ed76d3a8910be06cd4e4ba63bf6075bf903945a1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00346
epssPercentile: 0.25428
ingestedAt: '2026-08-15T13:26:45.241Z'
---

## Overview

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.

## Affected

- `linux_kernel >= 5.15, < 5.15.112`
- `linux_kernel >= 5.16, < 6.1.28`
- `linux_kernel >= 6.2, < 6.2.15`
- `linux_kernel >= 6.3, < 6.3.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.3.2`