---
id: CVE-2023-53006
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cifs: Fix oops due to uncleared server->smbd_conn in reconnect

  In smbd_destroy(), clear the server->smbd_conn pointer after freeing the
  smbd_connection struct that it …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cifs: Fix oops due to uncleared server->smbd_conn in reconnect

  In smbd_destroy(), clear the server->smbd_conn pointer after freeing the
  smbd_connection struct that it …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.16, < 4.19.272'
  - 'linux_kernel >= 4.20, < 5.4.231'
  - 'linux_kernel >= 5.5, < 5.10.166'
  - 'linux_kernel >= 5.11, < 5.15.91'
  - 'linux_kernel >= 5.16, < 6.1.9'
  - linux_kernel = 6.2
patched:
  - linux_kernel 6.1.9
published: '2025-03-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:17:35.477'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-53006'
references:
  - url: 'https://git.kernel.org/stable/c/4b83bc6f87eedab4599b0123e572a422689444be'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5109607a4ece7cd8536172bf7549eb4dce1f3576'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/91be54849d5392050f5b847b42bd5e6221551ac8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a9640c0b268405f2540e8203a545e930ea88bb7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b7ab9161cf5ddc42a288edf9d1a61f3bdffe17c7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e037baee16e0b9ace7e730888fcae9cec11daff2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00553
epssPercentile: 0.46004
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-15T21:33:05.727782Z'
ingestedAt: '2026-10-15T22:48:25.385Z'
---

## Overview

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

cifs: Fix oops due to uncleared server->smbd_conn in reconnect

In smbd_destroy(), clear the server->smbd_conn pointer after freeing the
smbd_connection struct that it points to so that reconnection doesn't get
confused.

## Affected

- `linux_kernel >= 4.16, < 4.19.272`
- `linux_kernel >= 4.20, < 5.4.231`
- `linux_kernel >= 5.5, < 5.10.166`
- `linux_kernel >= 5.11, < 5.15.91`
- `linux_kernel >= 5.16, < 6.1.9`
- `linux_kernel = 6.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.1.9`