---
id: CVE-2025-68347
title: 'ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events

  The DSP event handling code in hwdep_read() could write more bytes to
  the user buffer than reques…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    16620f0617400746984362c3d6ac547eeae1d35f
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    6275fd726d53a8ec724f20201cf3bd862711e17b
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    161291bac551821bba98eb4ea84c82338578d1b0
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    cdda0d06f8650e33255f79839f188bbece44117c
  - >-
    Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 <
    210d77cca3d0494ed30a5c628b20c1d95fa04fb1
  - Linux 5.16
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:04:48.612733Z'
published: '2025-12-24'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:09:43.312Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-68347'
references:
  - url: 'https://git.kernel.org/stable/c/16620f0617400746984362c3d6ac547eeae1d35f'
  - url: 'https://git.kernel.org/stable/c/ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe'
  - url: 'https://git.kernel.org/stable/c/6275fd726d53a8ec724f20201cf3bd862711e17b'
  - url: 'https://git.kernel.org/stable/c/161291bac551821bba98eb4ea84c82338578d1b0'
  - url: 'https://git.kernel.org/stable/c/cdda0d06f8650e33255f79839f188bbece44117c'
  - url: 'https://git.kernel.org/stable/c/210d77cca3d0494ed30a5c628b20c1d95fa04fb1'
tags:
  - cve.org
epss: 0.00175
epssPercentile: 0.06529
ingestedAt: '2026-10-16T17:24:46.631Z'
---

## Overview

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

ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events

The DSP event handling code in hwdep_read() could write more bytes to
the user buffer than requested, when a user provides a buffer smaller
than the event header size (8 bytes).

Fix by using min_t() to clamp the copy size, This ensures we never copy
more than the user requested.

## Affected

- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < 16620f0617400746984362c3d6ac547eeae1d35f`
- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe`
- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < 6275fd726d53a8ec724f20201cf3bd862711e17b`
- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < 161291bac551821bba98eb4ea84c82338578d1b0`
- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < cdda0d06f8650e33255f79839f188bbece44117c`
- `Linux >= 634ec0b2906efd46f6f57977e172aa3470aca432 < 210d77cca3d0494ed30a5c628b20c1d95fa04fb1`
- `Linux 5.16`

## Remediation

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