---
id: CVE-2024-26811
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: validate payload size in ipc response

  If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc
  response to ksmbd kernel server
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: validate payload size in ipc response

  If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc
  response to ksmbd kernel server. ksmbd should val…
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'
cwe:
  - CWE-787
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 6.9
  - linux_kernel = 6.9
patched:
  - linux_kernel 6.9
published: '2024-04-08'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26811'
references:
  - url: 'https://git.kernel.org/stable/c/51a6c2af9d20203ddeeaf73314ba8854b38d01bd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76af689a45aa44714b46d1a7de4ffdf851ded896'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/88b7f1143b15b29cccb8392b4f38e75b7bb3e300'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a637fabac554270a851033f5ab402ecb90bc479c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a677ebd8ca2f2632ccdecbad7b87641274e15aac'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/51a6c2af9d20203ddeeaf73314ba8854b38d01bd'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/76af689a45aa44714b46d1a7de4ffdf851ded896'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/88b7f1143b15b29cccb8392b4f38e75b7bb3e300'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a637fabac554270a851033f5ab402ecb90bc479c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a677ebd8ca2f2632ccdecbad7b87641274e15aac'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6XCNJZBDMGJXRIKLGKM4RRJU4XCHPX62/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LG6L4FXO4WNWUM6W7USOH2YTRVWREM3V/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RO3RO34MLQ6WT3A7O6STQUVXW43N6W3K/
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00794
epssPercentile: 0.54552
ingestedAt: '2026-08-05T10:46:49.422Z'
---

## Overview

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

ksmbd: validate payload size in ipc response

If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc
response to ksmbd kernel server. ksmbd should validate payload size of
ipc response from ksmbd.mountd to avoid memory overrun or
slab-out-of-bounds. This patch validate 3 ipc response that has payload.

## Affected

- `linux_kernel < 6.9`
- `linux_kernel = 6.9`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.9`