---
id: CVE-2025-39933
title: >-
  smb: client: let recv_done verify data_offset, data_length and
  remaining_data_length
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  smb: client: let recv_done verify data_offset, data_length and
  remaining_data_length


  This is inspired by the related server fixes.
severity: critical
cvss: 9.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 <
    f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728
  - >-
    Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 <
    241e58de23e7c1bbb9bee526c17d9a0f2a90fbad
  - >-
    Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 <
    581fb78e0388b78911b0c920e4073737090c8b5f
  - >-
    Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 <
    f57e53ea252363234f86674db475839e5b87102e
  - Linux 4.16
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-10T20:40:59.041091Z'
published: '2025-10-04'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:37:36.746Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-39933'
references:
  - url: 'https://git.kernel.org/stable/c/f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728'
  - url: 'https://git.kernel.org/stable/c/241e58de23e7c1bbb9bee526c17d9a0f2a90fbad'
  - url: 'https://git.kernel.org/stable/c/581fb78e0388b78911b0c920e4073737090c8b5f'
  - url: 'https://git.kernel.org/stable/c/f57e53ea252363234f86674db475839e5b87102e'
tags:
  - cve.org
epss: 0.00347
epssPercentile: 0.28167
ingestedAt: '2026-10-21T12:48:53.685Z'
---

## Overview

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

smb: client: let recv_done verify data_offset, data_length and remaining_data_length

This is inspired by the related server fixes.

## Affected

- `Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 < f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728`
- `Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 < 241e58de23e7c1bbb9bee526c17d9a0f2a90fbad`
- `Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 < 581fb78e0388b78911b0c920e4073737090c8b5f`
- `Linux >= f198186aa9bbd60fae7a2061f4feec614d880299 < f57e53ea252363234f86674db475839e5b87102e`
- `Linux 4.16`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.