---
id: CVE-2026-97565
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: client: reject short READ responses in CIFSSMBRead()

  CIFSSMBRead() reads DataLengthHigh, DataLength and DataOffset out of
  the READ_RSP returned by the server with…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: client: reject short READ responses in CIFSSMBRead()

  CIFSSMBRead() reads DataLengthHigh, DataLength and DataOffset out of
  the READ_RSP returned by the server with…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    aaa221c1b1d288845b55e9c366e5ef608dfff49d
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    e6142a8bfc230c7263eb8b0475249c958ce49367
  - Linux 2.6.12
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:07.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97565'
references:
  - url: 'https://git.kernel.org/stable/c/0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aaa221c1b1d288845b55e9c366e5ef608dfff49d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e6142a8bfc230c7263eb8b0475249c958ce49367'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.913Z'
---

## Overview

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

smb: client: reject short READ responses in CIFSSMBRead()

CIFSSMBRead() reads DataLengthHigh, DataLength and DataOffset out of
the READ_RSP returned by the server without first checking that a
whole READ_RSP was actually received. The length of the response is
recorded in rsp_iov.iov_len, but nothing constrains it to be at least
read_rsp_size before those fields are dereferenced.

A malicious or compromised SMB1 server can return a response shorter
than the READ_RSP header, so that parsing the header itself reads past
the end of the receive buffer. SMB1 is not negotiated by default;
reaching this code requires an explicit vers=1.0 mount.

Reject the response unless it is at least read_rsp_size bytes long.

## Remediation

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