{"api_version":"1","generated_at":"2026-05-13T08:50:32+00:00","cve":"CVE-2026-43340","urls":{"html":"https://cve.report/CVE-2026-43340","api":"https://cve.report/api/cve/CVE-2026-43340.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43340","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43340"},"summary":{"title":"comedi: Reinit dev->spinlock between attachments to low-level drivers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Reinit dev->spinlock between attachments to low-level drivers\n\n`struct comedi_device` is the main controlling structure for a COMEDI\ndevice created by the COMEDI subsystem.  It contains a member `spinlock`\ncontaining a spin-lock that is initialized by the COMEDI subsystem, but\nis reserved for use by a low-level driver attached to the COMEDI device\n(at least since commit 25436dc9d84f (\"Staging: comedi: remove RT\ncode\")).\n\nSome COMEDI devices (those created on initialization of the COMEDI\nsubsystem when the \"comedi.comedi_num_legacy_minors\" parameter is\nnon-zero) can be attached to different low-level drivers over their\nlifetime using the `COMEDI_DEVCONFIG` ioctl command.  This can result in\ninconsistent lock states being reported when there is a mismatch in the\nspin-lock locking levels used by each low-level driver to which the\nCOMEDI device has been attached.  Fix it by reinitializing\n`dev->spinlock` before calling the low-level driver's `attach` function\npointer if `CONFIG_LOCKDEP` is enabled.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 14:16:43","updated_at":"2026-05-12 14:10:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30","name":"https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7","name":"https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039","name":"https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560","name":"https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c","name":"https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a","name":"https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1","name":"https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55c","name":"https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43340","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43340","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 3181c34b415c5464be9d34bff3e43ef63b747039 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 2b1f49e4fdff3ef0f8e9158bbb5b149e06287560 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 4d5ffe524903a30e2e0da7d16841a56bec2de55c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed9eccbe8970f6eedc1b978c157caf1251a896d4 c01bcc67a9a692d65508ebd480405b5e77d562b7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43340","cve":"CVE-2026-43340","epss":"0.000240000","percentile":"0.070360000","score_date":"2026-05-12","updated_at":"2026-05-13 00:11:53"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/comedi/drivers.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3181c34b415c5464be9d34bff3e43ef63b747039","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"2b1f49e4fdff3ef0f8e9158bbb5b149e06287560","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"4d5ffe524903a30e2e0da7d16841a56bec2de55c","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"c01bcc67a9a692d65508ebd480405b5e77d562b7","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"430291d8f3884f57ae0057049b0ca291453e29e1","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"b89c026227712c367950bbae055a5b31073d3b30","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"83134a7a176ce5b4b19b6edecf4360e8d98d1a5a","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"},{"lessThan":"4b9a9a6d71e3e252032f959fb3895a33acb5865c","status":"affected","version":"ed9eccbe8970f6eedc1b978c157caf1251a896d4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/comedi/drivers.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Reinit dev->spinlock between attachments to low-level drivers\n\n`struct comedi_device` is the main controlling structure for a COMEDI\ndevice created by the COMEDI subsystem.  It contains a member `spinlock`\ncontaining a spin-lock that is initialized by the COMEDI subsystem, but\nis reserved for use by a low-level driver attached to the COMEDI device\n(at least since commit 25436dc9d84f (\"Staging: comedi: remove RT\ncode\")).\n\nSome COMEDI devices (those created on initialization of the COMEDI\nsubsystem when the \"comedi.comedi_num_legacy_minors\" parameter is\nnon-zero) can be attached to different low-level drivers over their\nlifetime using the `COMEDI_DEVCONFIG` ioctl command.  This can result in\ninconsistent lock states being reported when there is a mismatch in the\nspin-lock locking levels used by each low-level driver to which the\nCOMEDI device has been attached.  Fix it by reinitializing\n`dev->spinlock` before calling the low-level driver's `attach` function\npointer if `CONFIG_LOCKDEP` is enabled."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:22:40.639Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039"},{"url":"https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560"},{"url":"https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55c"},{"url":"https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7"},{"url":"https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1"},{"url":"https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30"},{"url":"https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a"},{"url":"https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c"}],"title":"comedi: Reinit dev->spinlock between attachments to low-level drivers","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43340","datePublished":"2026-05-08T13:37:18.580Z","dateReserved":"2026-05-01T14:12:56.003Z","dateUpdated":"2026-05-11T22:22:40.639Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 14:16:43","lastModifiedDate":"2026-05-12 14:10:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43340","Ordinal":"1","Title":"comedi: Reinit dev->spinlock between attachments to low-level dr","CVE":"CVE-2026-43340","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43340","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Reinit dev->spinlock between attachments to low-level drivers\n\n`struct comedi_device` is the main controlling structure for a COMEDI\ndevice created by the COMEDI subsystem.  It contains a member `spinlock`\ncontaining a spin-lock that is initialized by the COMEDI subsystem, but\nis reserved for use by a low-level driver attached to the COMEDI device\n(at least since commit 25436dc9d84f (\"Staging: comedi: remove RT\ncode\")).\n\nSome COMEDI devices (those created on initialization of the COMEDI\nsubsystem when the \"comedi.comedi_num_legacy_minors\" parameter is\nnon-zero) can be attached to different low-level drivers over their\nlifetime using the `COMEDI_DEVCONFIG` ioctl command.  This can result in\ninconsistent lock states being reported when there is a mismatch in the\nspin-lock locking levels used by each low-level driver to which the\nCOMEDI device has been attached.  Fix it by reinitializing\n`dev->spinlock` before calling the low-level driver's `attach` function\npointer if `CONFIG_LOCKDEP` is enabled.","Type":"Description","Title":"comedi: Reinit dev->spinlock between attachments to low-level dr"}]}}}