{"api_version":"1","generated_at":"2026-09-17T08:30:35+00:00","cve":"CVE-2026-89901","urls":{"html":"https://cve.report/CVE-2026-89901","api":"https://cve.report/api/cve/CVE-2026-89901.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89901","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89901"},"summary":{"title":"media: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref\n\nairspy_disconnect() clears s->udev under v4l2_lock, but\nairspy_stop_streaming() unconditionally calls airspy_ctrl_msg() and\nairspy_free_stream_bufs() afterwards. If a streaming user closes the\ndevice after disconnect, stop_streaming() runs and dereferences the\nNULL s->udev:\n\n  airspy_stop_streaming()\n    airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0)\n      usb_sndctrlpipe(s->udev, 0)         /* NULL deref */\n    airspy_free_stream_bufs(s)\n      usb_free_coherent(s->udev, ...)     /* NULL deref */\n\nThe airspy driver uses vb2_fop_release() in its file_operations, so\nreplace video_unregister_device(&s->vdev) with\nvb2_video_unregister_device(&s->vdev) and move it before clearing\ns->udev. vb2_video_unregister_device() releases the vb2 queue, which\nsynchronously runs airspy_stop_streaming() if streaming is active, so\nthe URBs, coherent DMA stream buffers and the hardware stop control\nmessage all execute while s->udev is still valid.\n\nvb2_video_unregister_device() locks vdev->queue->lock (vb_queue_lock)\ninternally, and stop_streaming() locks v4l2_lock, so the previous outer\nmutex_lock(&s->vb_queue_lock) / mutex_lock(&s->v4l2_lock) pair around\nthe unregister sequence would self-deadlock and has been removed. A\nshort v4l2_lock critical section around s->udev = NULL remains so any\nioctl path that still holds the file descriptor sees coherent state.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:16:59","updated_at":"2026-09-16 11:16:59"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c9081e2655188d2d134a741aec837dc70439d505","name":"https://git.kernel.org/stable/c/c9081e2655188d2d134a741aec837dc70439d505","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/297fee023f46d771a844520675692ea089d80d9d","name":"https://git.kernel.org/stable/c/297fee023f46d771a844520675692ea089d80d9d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/75089cea32e5055773bd13116236d08fdc98678a","name":"https://git.kernel.org/stable/c/75089cea32e5055773bd13116236d08fdc98678a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9a8c37ddda9fa3687b142be9098e1c37b8faf35","name":"https://git.kernel.org/stable/c/a9a8c37ddda9fa3687b142be9098e1c37b8faf35","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e4ea90fdc6608cd5fac342e146ab6ae15d430bc","name":"https://git.kernel.org/stable/c/6e4ea90fdc6608cd5fac342e146ab6ae15d430bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2f378dc45e685fc825d2dd08e7864666d6fcc009","name":"https://git.kernel.org/stable/c/2f378dc45e685fc825d2dd08e7864666d6fcc009","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/155d0378ae0d6305cc4840583a6b42d2d0595bff","name":"https://git.kernel.org/stable/c/155d0378ae0d6305cc4840583a6b42d2d0595bff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c6749ac8f59cc80eb1b2d52f167fdf13e12655cc","name":"https://git.kernel.org/stable/c/c6749ac8f59cc80eb1b2d52f167fdf13e12655cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89901","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89901","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d c9081e2655188d2d134a741aec837dc70439d505 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d 75089cea32e5055773bd13116236d08fdc98678a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d 155d0378ae0d6305cc4840583a6b42d2d0595bff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d 6e4ea90fdc6608cd5fac342e146ab6ae15d430bc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d a9a8c37ddda9fa3687b142be9098e1c37b8faf35 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d 297fee023f46d771a844520675692ea089d80d9d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d c6749ac8f59cc80eb1b2d52f167fdf13e12655cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 634fe5033951b80ef4b98d8f047cb1083d29170d 2f378dc45e685fc825d2dd08e7864666d6fcc009 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* 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/airspy/airspy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c9081e2655188d2d134a741aec837dc70439d505","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"75089cea32e5055773bd13116236d08fdc98678a","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"155d0378ae0d6305cc4840583a6b42d2d0595bff","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"6e4ea90fdc6608cd5fac342e146ab6ae15d430bc","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"a9a8c37ddda9fa3687b142be9098e1c37b8faf35","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"297fee023f46d771a844520675692ea089d80d9d","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"c6749ac8f59cc80eb1b2d52f167fdf13e12655cc","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"},{"lessThan":"2f378dc45e685fc825d2dd08e7864666d6fcc009","status":"affected","version":"634fe5033951b80ef4b98d8f047cb1083d29170d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/media/usb/airspy/airspy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.17"},{"lessThan":"3.17","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":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref\n\nairspy_disconnect() clears s->udev under v4l2_lock, but\nairspy_stop_streaming() unconditionally calls airspy_ctrl_msg() and\nairspy_free_stream_bufs() afterwards. If a streaming user closes the\ndevice after disconnect, stop_streaming() runs and dereferences the\nNULL s->udev:\n\n  airspy_stop_streaming()\n    airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0)\n      usb_sndctrlpipe(s->udev, 0)         /* NULL deref */\n    airspy_free_stream_bufs(s)\n      usb_free_coherent(s->udev, ...)     /* NULL deref */\n\nThe airspy driver uses vb2_fop_release() in its file_operations, so\nreplace video_unregister_device(&s->vdev) with\nvb2_video_unregister_device(&s->vdev) and move it before clearing\ns->udev. vb2_video_unregister_device() releases the vb2 queue, which\nsynchronously runs airspy_stop_streaming() if streaming is active, so\nthe URBs, coherent DMA stream buffers and the hardware stop control\nmessage all execute while s->udev is still valid.\n\nvb2_video_unregister_device() locks vdev->queue->lock (vb_queue_lock)\ninternally, and stop_streaming() locks v4l2_lock, so the previous outer\nmutex_lock(&s->vb_queue_lock) / mutex_lock(&s->v4l2_lock) pair around\nthe unregister sequence would self-deadlock and has been removed. A\nshort v4l2_lock critical section around s->udev = NULL remains so any\nioctl path that still holds the file descriptor sees coherent state.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/"}],"providerMetadata":{"dateUpdated":"2026-09-16T10:32:00.997Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c9081e2655188d2d134a741aec837dc70439d505"},{"url":"https://git.kernel.org/stable/c/75089cea32e5055773bd13116236d08fdc98678a"},{"url":"https://git.kernel.org/stable/c/155d0378ae0d6305cc4840583a6b42d2d0595bff"},{"url":"https://git.kernel.org/stable/c/6e4ea90fdc6608cd5fac342e146ab6ae15d430bc"},{"url":"https://git.kernel.org/stable/c/a9a8c37ddda9fa3687b142be9098e1c37b8faf35"},{"url":"https://git.kernel.org/stable/c/297fee023f46d771a844520675692ea089d80d9d"},{"url":"https://git.kernel.org/stable/c/c6749ac8f59cc80eb1b2d52f167fdf13e12655cc"},{"url":"https://git.kernel.org/stable/c/2f378dc45e685fc825d2dd08e7864666d6fcc009"}],"title":"media: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89901","datePublished":"2026-09-16T10:32:00.997Z","dateReserved":"2026-09-11T19:38:34.774Z","dateUpdated":"2026-09-16T10:32:00.997Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:16:59","lastModifiedDate":"2026-09-16 11:16:59","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89901","Ordinal":"1","Title":"media: airspy: use vb2_video_unregister_device() on disconnect t","CVE":"CVE-2026-89901","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89901","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref\n\nairspy_disconnect() clears s->udev under v4l2_lock, but\nairspy_stop_streaming() unconditionally calls airspy_ctrl_msg() and\nairspy_free_stream_bufs() afterwards. If a streaming user closes the\ndevice after disconnect, stop_streaming() runs and dereferences the\nNULL s->udev:\n\n  airspy_stop_streaming()\n    airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0)\n      usb_sndctrlpipe(s->udev, 0)         /* NULL deref */\n    airspy_free_stream_bufs(s)\n      usb_free_coherent(s->udev, ...)     /* NULL deref */\n\nThe airspy driver uses vb2_fop_release() in its file_operations, so\nreplace video_unregister_device(&s->vdev) with\nvb2_video_unregister_device(&s->vdev) and move it before clearing\ns->udev. vb2_video_unregister_device() releases the vb2 queue, which\nsynchronously runs airspy_stop_streaming() if streaming is active, so\nthe URBs, coherent DMA stream buffers and the hardware stop control\nmessage all execute while s->udev is still valid.\n\nvb2_video_unregister_device() locks vdev->queue->lock (vb_queue_lock)\ninternally, and stop_streaming() locks v4l2_lock, so the previous outer\nmutex_lock(&s->vb_queue_lock) / mutex_lock(&s->v4l2_lock) pair around\nthe unregister sequence would self-deadlock and has been removed. A\nshort v4l2_lock critical section around s->udev = NULL remains so any\nioctl path that still holds the file descriptor sees coherent state.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/","Type":"Description","Title":"media: airspy: use vb2_video_unregister_device() on disconnect t"}]}}}