---
id: CVE-2026-90032
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: usbtv: keep device alive while ALSA card exists

  The ALSA PCM callbacks store the driver state in pcm->private_data
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: usbtv: keep device alive while ALSA card exists

  The ALSA PCM callbacks store the driver state in pcm->private_data. An
  open PCM file can outlive USB disconnect …
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'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    97b5e8b22b98e287481a97a9a4cfebbb348738a5
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    503be26ff888cb3576e55d251895d290e8146f27
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    be0f7745f883386e5263b4e475686a81dfa87175
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    67374e3a00814dcdd46e9feca61f69f7f2d81957
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    239d1683e08b2aee2a15ef35706e1ea9a76681d8
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    7690a86b193271322cd31ab77349a87aa10858e4
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    1618257cb0aba4ce342ae8c0228368c24161f5fb
  - >-
    Linux >= 63ddf68de52efaac40a9287e44266ac30e71dd36 <
    fc530fe168bb2b745a93f553ad21fc25fd9cba3d
  - Linux 3.18
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:26.280'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90032'
references:
  - url: 'https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.932Z'
epss: 0.00176
epssPercentile: 0.06284
---

## Overview

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

media: usbtv: keep device alive while ALSA card exists

The ALSA PCM callbacks store the driver state in pcm->private_data. An
open PCM file can outlive USB disconnect because usbtv_audio_free() uses
snd_card_free_when_closed(). The disconnect path can then drop the V4L2
device reference and free struct usbtv before ALSA releases the substream,
so a later close dereferences freed memory in snd_usbtv_pcm_close().

Take a V4L2 device reference for the ALSA card and drop it from the card
private_free callback. This keeps struct usbtv valid until ALSA has closed
the remaining files and freed the card.

## Remediation

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