HIGH 7.8 NVD
CVE-2026-90032
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 dr
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
- https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8
- https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27
- https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957
- https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-16 via NVD.
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