{"api_version":"1","generated_at":"2026-09-17T14:47:49+00:00","cve":"CVE-2026-90032","urls":{"html":"https://cve.report/CVE-2026-90032","api":"https://cve.report/api/cve/CVE-2026-90032.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90032","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90032"},"summary":{"title":"media: usbtv: keep device alive while ALSA card exists","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: usbtv: keep device alive while ALSA card exists\n\nThe ALSA PCM callbacks store the driver state in pcm->private_data. An\nopen PCM file can outlive USB disconnect because usbtv_audio_free() uses\nsnd_card_free_when_closed(). The disconnect path can then drop the V4L2\ndevice reference and free struct usbtv before ALSA releases the substream,\nso a later close dereferences freed memory in snd_usbtv_pcm_close().\n\nTake a V4L2 device reference for the ALSA card and drop it from the card\nprivate_free callback. This keeps struct usbtv valid until ALSA has closed\nthe remaining files and freed the card.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:17:16","updated_at":"2026-09-16 15:18:26"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27","name":"https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5","name":"https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175","name":"https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957","name":"https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d","name":"https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb","name":"https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4","name":"https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8","name":"https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90032","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90032","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 63ddf68de52efaac40a9287e44266ac30e71dd36 97b5e8b22b98e287481a97a9a4cfebbb348738a5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 63ddf68de52efaac40a9287e44266ac30e71dd36 503be26ff888cb3576e55d251895d290e8146f27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 63ddf68de52efaac40a9287e44266ac30e71dd36 be0f7745f883386e5263b4e475686a81dfa87175 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 63ddf68de52efaac40a9287e44266ac30e71dd36 67374e3a00814dcdd46e9feca61f69f7f2d81957 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.51 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.5 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/media/usb/usbtv/usbtv-audio.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"97b5e8b22b98e287481a97a9a4cfebbb348738a5","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"503be26ff888cb3576e55d251895d290e8146f27","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"be0f7745f883386e5263b4e475686a81dfa87175","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"67374e3a00814dcdd46e9feca61f69f7f2d81957","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"239d1683e08b2aee2a15ef35706e1ea9a76681d8","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"7690a86b193271322cd31ab77349a87aa10858e4","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"1618257cb0aba4ce342ae8c0228368c24161f5fb","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"},{"lessThan":"fc530fe168bb2b745a93f553ad21fc25fd9cba3d","status":"affected","version":"63ddf68de52efaac40a9287e44266ac30e71dd36","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/media/usb/usbtv/usbtv-audio.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.18"},{"lessThan":"3.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.51","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: usbtv: keep device alive while ALSA card exists\n\nThe ALSA PCM callbacks store the driver state in pcm->private_data. An\nopen PCM file can outlive USB disconnect because usbtv_audio_free() uses\nsnd_card_free_when_closed(). The disconnect path can then drop the V4L2\ndevice reference and free struct usbtv before ALSA releases the substream,\nso a later close dereferences freed memory in snd_usbtv_pcm_close().\n\nTake a V4L2 device reference for the ALSA card and drop it from the card\nprivate_free callback. This keeps struct usbtv valid until ALSA has closed\nthe remaining files and freed the card."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The UAF is reached locally by opening the usbtv ALSA capture PCM, forcing usbtv_disconnect() via USBDEVFS_DISCONNECT or sysfs unbind on an already-bound USBTV007, then closing the PCM fd; there is no network or packet path. This matches AV:L scoring of analogous USB disconnect UAFs (CVE-2026-80971, CVE-2026-64585); physical unplug is only an extra path.\nAC:L - The attacker fully controls the sequence: open /dev/snd/pcmC*D*c so PCM callbacks pin pcm->private_data, issue USBDEVFS_DISCONNECT so snd_card_free_when_closed() returns without waiting, then close. That close deterministically hits freed struct usbtv in snd_usbtv_pcm_close(); no attacker-uncontrollable race or layout is required.\nPR:L - USBDEVFS_DISCONNECT has no capable() check, only write access to /dev/bus/usb that udev uaccess/plugdev rules grant seat users, and snd_pcm_open() has no capability gate on the capture PCM node (audio group/uaccess). An unprivileged local account suffices; init-namespace root is not required.\nUI:N - The attacker performs open, disconnect, and close on their own fds against an already-attached USBTV007 (capture kiosk, digitizer, or surveillance station). No separate victim action such as plugging a device or clicking is required during exploitation.\nS:U - The slab use-after-free of struct usbtv and the PCM close/trigger callbacks run entirely in the host kernel. This is ordinary local privilege escalation, not a VM, IOMMU, or sandbox boundary escape.\nC:H - snd_usbtv_pcm_close() and snd_usbtv_card_trigger() read fields of the kfree()'d struct usbtv (snd_stream, snd_trigger, snd_bulk_urb). Reclaiming that slab lets the attacker supply pointer-rich state those paths then read, enabling kernel disclosure as with other heap UAFs.\nI:H - Close can atomic_set snd_stream and schedule_work() on the freed usbtv.snd_trigger work_struct, and snd_pcm_drop may call trigger STOP on the same freed object. A reclaimed fake usbtv plus workqueue execution is a control-flow hijack primitive, so integrity impact is High.\nA:H - Use-after-free of struct usbtv in snd_usbtv_pcm_close() (and in usbtv_audio_urb_received if capture was running when USB core kills the URB after disconnect) oopses or panics the kernel. The attacker can repeat disconnect/close to crash on demand, so availability impact is High."}]}],"providerMetadata":{"dateUpdated":"2026-09-16T14:41:46.318Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5"},{"url":"https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27"},{"url":"https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175"},{"url":"https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957"},{"url":"https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8"},{"url":"https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4"},{"url":"https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb"},{"url":"https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d"}],"title":"media: usbtv: keep device alive while ALSA card exists","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90032","datePublished":"2026-09-16T10:33:33.197Z","dateReserved":"2026-09-11T19:38:34.782Z","dateUpdated":"2026-09-16T14:41:46.318Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:17:16","lastModifiedDate":"2026-09-16 15:18:26","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90032","Ordinal":"1","Title":"media: usbtv: keep device alive while ALSA card exists","CVE":"CVE-2026-90032","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90032","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: usbtv: keep device alive while ALSA card exists\n\nThe ALSA PCM callbacks store the driver state in pcm->private_data. An\nopen PCM file can outlive USB disconnect because usbtv_audio_free() uses\nsnd_card_free_when_closed(). The disconnect path can then drop the V4L2\ndevice reference and free struct usbtv before ALSA releases the substream,\nso a later close dereferences freed memory in snd_usbtv_pcm_close().\n\nTake a V4L2 device reference for the ALSA card and drop it from the card\nprivate_free callback. This keeps struct usbtv valid until ALSA has closed\nthe remaining files and freed the card.","Type":"Description","Title":"media: usbtv: keep device alive while ALSA card exists"}]}}}