CVEvulnerability
CVE-2026-90032
7.8 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-09-16
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
References
- https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb git.kernel.org
- https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8 git.kernel.org
- https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27 git.kernel.org
- https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957 git.kernel.org
- https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4 git.kernel.org
- https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5 git.kernel.org
- https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175 git.kernel.org
- https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d git.kernel.org