---
id: CVE-2026-90116
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: mtpav: shut down output timer before card teardown

  snd_mtpav_output_timer() rearms chip->timer while holding
  chip->spinlock and accesses the card-private mtpav s…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: mtpav: shut down output timer before card teardown

  snd_mtpav_output_timer() rearms chip->timer while holding
  chip->spinlock and accesses the card-private mtpav s…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    392c985c6b03dfdf4904c0d464f18735ca3c4df8
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    1e16e82581521a2fe20eda29bdc9e75286f7c950
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c73cb5b7c159246dd572277c668851a56e516019
  - Linux 2.6.12
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:03.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90116'
references:
  - url: 'https://git.kernel.org/stable/c/1e16e82581521a2fe20eda29bdc9e75286f7c950'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/392c985c6b03dfdf4904c0d464f18735ca3c4df8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c73cb5b7c159246dd572277c668851a56e516019'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.884Z'
epss: 0.00198
epssPercentile: 0.09812
---

## Overview

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

ALSA: mtpav: shut down output timer before card teardown

snd_mtpav_output_timer() rearms chip->timer while holding
chip->spinlock and accesses the card-private mtpav state.

snd_mtpav_free() currently takes the same lock and calls
timer_delete() when the timer is active. This only removes a
pending timer; it does not wait for a callback that is already
running and does not prevent the callback from rearming the timer.

A callback running on another CPU can therefore continue after
snd_mtpav_free() releases the lock and access the card-private
state while the card is being torn down. It can also rearm the
timer after timer_delete() has returned.

Call timer_shutdown_sync() without holding chip->spinlock. This
waits for any running callback to finish and prevents further
rearming before the card-private mtpav state is released.

## Remediation

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