---
id: CVE-2026-80828
title: 'ALSA: usb-audio: Complete cleanup after system-resume errors'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: Complete cleanup after system-resume errors

  A failed system resume can leave the card unusable until reboot.
  usb_audio_resume() jumps to err_out when …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    3fa521c3c54b42e16cad8ade76551113a783752b
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    3f06f3f5b16212f180764654a9398ff5f7a855c8
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    f1c05c41d07b874635d681ae328d13ec550470c5
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    5a625fc2284e35f33693efd9534aebaca3b005d4
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    6d3e202670b819c414076a5d07dffac8a39274ad
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    6c94877b6bab9185898bcad4b082ff5592558921
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    d1f643b1c0258bd519146f7a342bbb394d413912
  - >-
    Linux >= 88a8516a2128a6d078a106ead48092240e8a138f <
    1739a976312e110c93a8dee66a1cdf893a1b187e
  - Linux 2.6.39
published: '2026-09-04'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:44:20.734Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80828'
references:
  - url: 'https://git.kernel.org/stable/c/3fa521c3c54b42e16cad8ade76551113a783752b'
  - url: 'https://git.kernel.org/stable/c/3f06f3f5b16212f180764654a9398ff5f7a855c8'
  - url: 'https://git.kernel.org/stable/c/f1c05c41d07b874635d681ae328d13ec550470c5'
  - url: 'https://git.kernel.org/stable/c/5a625fc2284e35f33693efd9534aebaca3b005d4'
  - url: 'https://git.kernel.org/stable/c/6d3e202670b819c414076a5d07dffac8a39274ad'
  - url: 'https://git.kernel.org/stable/c/6c94877b6bab9185898bcad4b082ff5592558921'
  - url: 'https://git.kernel.org/stable/c/d1f643b1c0258bd519146f7a342bbb394d413912'
  - url: 'https://git.kernel.org/stable/c/1739a976312e110c93a8dee66a1cdf893a1b187e'
tags:
  - cve.org
epss: 0.0019
epssPercentile: 0.08089
ingestedAt: '2026-10-19T09:16:01.502Z'
---

## Overview

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

ALSA: usb-audio: Complete cleanup after system-resume errors

A failed system resume can leave the card unusable until reboot.
usb_audio_resume() jumps to err_out when snd_usb_pcm_resume() or
snd_usb_mixer_resume() fails. The error path skips the out: block, which
restores D0 and decrements chip->num_suspended_intf.

The card stays in SNDRV_CTL_POWER_D3hot, so later control access blocks in
snd_power_ref_and_wait(). USB core logs an interface resume callback error.
It does not retry that callback, so a later callback cannot complete the
skipped cleanup.

usb_audio_suspend() increments num_suspended_intf before returning success.
A system-resume callback must consume the system-suspend count even if a
component resume fails. Otherwise, the stranded count skews later suspend
and resume cycles.

Do not apply this cleanup to runtime-resume errors. Runtime PM can retry
-EAGAIN or -EBUSY without another suspend callback. The count must continue
to describe that suspended interface. Other runtime-resume errors latch
runtime_error in the PM core and do not cause an immediate callback retry.

Both parts of the system-resume error path are longstanding. Commit
88a8516a2128a ("ALSA: usbaudio: implement USB autosuspend") introduced
err_out past the D0 restore. Commit 862b2509d157c ("ALSA: usb-audio: Fix
inconsistent card PM state after resume") later moved
num_suspended_intf-- into the out: block. The error path now skips both
operations.

No third-party code is needed to reach the error path.
snd_usb_mixer_resume() ends in snd_usb_mixer_activate(), which returns the
result of usb_submit_urb() for devices that have a mixer status URB. Its
mixer->private_resume hook can also fail through scarlett2_init_notify().
snd_usb_pcm_resume() issues a SET_CUR request to a UAC3 power domain. It
can return -EPIPE or -EIO when the device stalls the request.

Route a component error through out: only when system_suspend is nonzero.
Continue to return runtime-resume errors through err_out. Later component
resume stages remain skipped. The original error still reaches USB core.
A later transfer can fail if the device did not recover.

I reproduced the system-resume failure on an Audient iD14 MkI with an
out-of-tree diagnostic mixer resume hook. An injected -EIO on the unpatched
core left control readers in uninterruptible sleep in
snd_power_ref_and_wait() until a reboot. With this patch, the same failure
restored control access. A second system suspend and resume also succeeded
after I disabled fault injection.

## Affected

- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3fa521c3c54b42e16cad8ade76551113a783752b`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3f06f3f5b16212f180764654a9398ff5f7a855c8`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < f1c05c41d07b874635d681ae328d13ec550470c5`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 5a625fc2284e35f33693efd9534aebaca3b005d4`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6d3e202670b819c414076a5d07dffac8a39274ad`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6c94877b6bab9185898bcad4b082ff5592558921`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < d1f643b1c0258bd519146f7a342bbb394d413912`
- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 1739a976312e110c93a8dee66a1cdf893a1b187e`
- `Linux 2.6.39`

## Remediation

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