CVE-2026-90032Hinoki check available

Kernel crash via usbtv ALSA use-after-free

Published Sep 16, 2026 · Updated Sep 16, 2026

Use-after-free in the Linux kernel usbtv driver allows local users to crash the kernel by closing PCM audio after USB disconnect. An open ALSA PCM file outlives disconnection while the V4L2 reference is dropped, so snd_usbtv_pcm_close dereferences the freed usbtv structure. Exploitation requires local access to an open usbtv audio stream and disconnection of the associated USB capture device; the demonstrated consequence is a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in the Linux kernel usbtv driver allows local users to crash the kernel by closing PCM audio after USB disconnect. An open ALSA PCM file outlives disconnection while the V4L2 reference is dropped, so snd_usbtv_pcm_close dereferences the freed usbtv structure. Exploitation requires local access to an open usbtv audio stream and disconnection of the associated USB capture device; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2026-90032
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.18
  2. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <1618257cb0aba4ce342ae8c0228368c24161f5fb
  3. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <239d1683e08b2aee2a15ef35706e1ea9a76681d8
  4. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <503be26ff888cb3576e55d251895d290e8146f27
  5. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <67374e3a00814dcdd46e9feca61f69f7f2d81957
  6. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <7690a86b193271322cd31ab77349a87aa10858e4
  7. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <97b5e8b22b98e287481a97a9a4cfebbb348738a5
  8. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <be0f7745f883386e5263b4e475686a81dfa87175
  9. Affected versionversion=63ddf68de52efaac40a9287e44266ac30e71dd36 <fc530fe168bb2b745a93f553ad21fc25fd9cba3d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <1618257cb0aba4ce342ae8c0228368c24161f5fb; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <239d1683e08b2aee2a15ef35706e1ea9a76681d8; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <503be26ff888cb3576e55d251895d290e8146f27; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <67374e3a00814dcdd46e9feca61f69f7f2d81957; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <7690a86b193271322cd31ab77349a87aa10858e4; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <97b5e8b22b98e287481a97a9a4cfebbb348738a5; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <be0f7745f883386e5263b4e475686a81dfa87175; version=63ddf68de52efaac40a9287e44266ac30e71dd36 <fc530fe168bb2b745a93f553ad21fc25fd9cba3d

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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