{"id":"CVE-2026-89735","state":"PUBLISHED","title":"usb: gadget: midi2: remove default configfs groups on teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: midi2: remove default configfs groups on teardown\n\nf_midi2_alloc_inst() creates default configfs child groups for the\ndefault endpoint and default block using configfs_add_default_group(),\nsetting their internal refcount to 1.\n\nHowever, during function teardown in f_midi2_free_inst() or EP cleanup\nin f_midi2_ep_opts_release(), configfs_remove_default_groups() is\nnever called, therefore never dropping the refcount and leaking struct\nf_midi2_ep_opts and f_midi2_block_opts.\n\nAdd the missing configfs_remove_default_groups() in the afformentioned\nfunctions to free the structs properly.","publishedAt":"2026-09-11T19:46:43.899Z","updatedAt":"2026-10-19T08:51:48.488Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"79dbedf40ad930f83839e564394dc5d1a54938c6","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"4beda67ee72e0c8df5b49951dd8b96f6adb25e02","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"a15c2acd3083461f91725760e59dff88b33c28f6","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"0f6bffb5008f0cba9cad5ded2caccc64466a6e54","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_midi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_midi2.c"]}],"references":["https://git.kernel.org/stable/c/79dbedf40ad930f83839e564394dc5d1a54938c6","https://git.kernel.org/stable/c/4beda67ee72e0c8df5b49951dd8b96f6adb25e02","https://git.kernel.org/stable/c/a15c2acd3083461f91725760e59dff88b33c28f6","https://git.kernel.org/stable/c/9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700","https://git.kernel.org/stable/c/0f6bffb5008f0cba9cad5ded2caccc64466a6e54"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89735.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89735","state":"PUBLISHED","datePublished":"2026-09-11T19:46:43.899Z","dateUpdated":"2026-10-19T08:51:48.488Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.760Z"},"containers":{"cna":{"title":"usb: gadget: midi2: remove default configfs groups on teardown","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: midi2: remove default configfs groups on teardown\n\nf_midi2_alloc_inst() creates default configfs child groups for the\ndefault endpoint and default block using configfs_add_default_group(),\nsetting their internal refcount to 1.\n\nHowever, during function teardown in f_midi2_free_inst() or EP cleanup\nin f_midi2_ep_opts_release(), configfs_remove_default_groups() is\nnever called, therefore never dropping the refcount and leaking struct\nf_midi2_ep_opts and f_midi2_block_opts.\n\nAdd the missing configfs_remove_default_groups() in the afformentioned\nfunctions to free the structs properly."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"79dbedf40ad930f83839e564394dc5d1a54938c6","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"4beda67ee72e0c8df5b49951dd8b96f6adb25e02","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"a15c2acd3083461f91725760e59dff88b33c28f6","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700","versionType":"git"},{"version":"8b645922b22303cec4628dbbbf6c8553d1cdec87","status":"affected","lessThan":"0f6bffb5008f0cba9cad5ded2caccc64466a6e54","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_midi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_midi2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/79dbedf40ad930f83839e564394dc5d1a54938c6"},{"url":"https://git.kernel.org/stable/c/4beda67ee72e0c8df5b49951dd8b96f6adb25e02"},{"url":"https://git.kernel.org/stable/c/a15c2acd3083461f91725760e59dff88b33c28f6"},{"url":"https://git.kernel.org/stable/c/9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700"},{"url":"https://git.kernel.org/stable/c/0f6bffb5008f0cba9cad5ded2caccc64466a6e54"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:51:48.488Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}