CVE-2026-90032

HighCVSS 7.8/10Last modified Oct 19, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 97b5e8b22b98e287481a97a9a4cfebbb348738a5; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 503be26ff888cb3576e55d251895d290e8146f27; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < be0f7745f883386e5263b4e475686a81dfa87175; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 67374e3a00814dcdd46e9feca61f69f7f2d81957; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 239d1683e08b2aee2a15ef35706e1ea9a76681d8; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 7690a86b193271322cd31ab77349a87aa10858e4; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < 1618257cb0aba4ce342ae8c0228368c24161f5fb; >= 63ddf68de52efaac40a9287e44266ac30e71dd36, < fc530fe168bb2b745a93f553ad21fc25fd9cba3d
LinuxLinux3.18

References

Timeline

Published
Sep 16, 2026
Last modified
Oct 19, 2026
NVD status
Received

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CVE-2026-90032: High severity, CVSS 7.8 | Vulnix