---
id: CVE-2026-98167
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: client: fix server->total_read for compound encrypted PDUs

  In receive_encrypted_standard(), server->total_read is left at the
  full decrypted frame size when walki…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: client: fix server->total_read for compound encrypted PDUs

  In receive_encrypted_standard(), server->total_read is left at the
  full decrypted frame size when walki…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    8703539d22fdbc13dd2db090ee199c3a427b8ea0
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    e78fc1d240b27349b45a0f1c3e3c2c401d7e230d
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    a46eb242e9eef3a3897d166748b23303c516e870
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    282b72f9a7ef31296c48366db4128882999cc048
  - >-
    Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 <
    f73726b83e4756fdaa099e1bc1143293bd57ad79
  - Linux 4.19
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:17:58.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98167'
references:
  - url: 'https://git.kernel.org/stable/c/282b72f9a7ef31296c48366db4128882999cc048'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8703539d22fdbc13dd2db090ee199c3a427b8ea0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a46eb242e9eef3a3897d166748b23303c516e870'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e78fc1d240b27349b45a0f1c3e3c2c401d7e230d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f73726b83e4756fdaa099e1bc1143293bd57ad79'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.459Z'
---

## Overview

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

smb: client: fix server->total_read for compound encrypted PDUs

In receive_encrypted_standard(), server->total_read is left at the
full decrypted frame size when walking sub-PDUs of a compound encrypted
frame. As a result, cifs_handle_standard() passes this full size
to smb2_check_message(), causing the PDU length guards to incorrectly
validate the entire compound frame instead of the current sub-PDU.

This allows truncated non-last sub-PDUs to bypass length validation,
leading to out-of-bounds reads in smb2_get_data_area_len().

Fix this by setting server->total_read to the true length of the
current sub-PDU: next_cmd for non-last sub-PDUs, and the remaining
pdu_length for the last one.

## Remediation

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