Vulnerability details
CVE-2026-90032
Linux Linux
media: usbtv: keep device alive while ALSA card exists
CVSS 3.1
7.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.18 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 503be26ff888cb3576e55d251895d290e8146f27 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < be0f7745f883386e5263b4e475686a81dfa87175 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 67374e3a00814dcdd46e9feca61f69f7f2d81957 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 97b5e8b22b98e287481a97a9a4cfebbb348738a5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 7690a86b193271322cd31ab77349a87aa10858e4 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 1618257cb0aba4ce342ae8c0228368c24161f5fb | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < fc530fe168bb2b745a93f553ad21fc25fd9cba3d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 63ddf68de52efaac40a9287e44266ac30e71dd36 ≤ v < 239d1683e08b2aee2a15ef35706e1ea9a76681d8 | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5
- https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27
- https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175
- https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957
- https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8
- https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4
- https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb
- https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d
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Details
- Published
- 2026-09-16
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.15%
Probability of exploitation in 30 days
4.8%
Percentile (among all CVEs)
Weaknesses (CWE)
- —