CVE-2026-89735

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89735", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.760Z", "datePublished": "2026-09-11T19:46:43.899Z", "dateUpdated": "2026-10-19T08:51:48.488Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:51:48.488Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/f_midi2.c"], "versions": [{"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "79dbedf40ad930f83839e564394dc5d1a54938c6", "status": "affected", "versionType": "git"}, {"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "4beda67ee72e0c8df5b49951dd8b96f6adb25e02", "status": "affected", "versionType": "git"}, {"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "a15c2acd3083461f91725760e59dff88b33c28f6", "status": "affected", "versionType": "git"}, {"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700", "status": "affected", "versionType": "git"}, {"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "0f6bffb5008f0cba9cad5ded2caccc64466a6e54", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/f_midi2.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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"}]}]}], "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"}], "title": "usb: gadget: midi2: remove default configfs groups on teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/usb/gadget/function/f_midi2.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "79dbedf40ad930f83839e564394dc5d1a54938c6", "status": "affected", "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "versionType": "git"}, {"lessThan": "4beda67ee72e0c8df5b49951dd8b96f6adb25e02", "status": "affected", "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "versionType": "git"}, {"lessThan": "a15c2acd3083461f91725760e59dff88b33c28f6", "status": "affected", "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "versionType": "git"}, {"lessThan": "9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700", "status": "affected", "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "versionType": "git"}, {"lessThan": "0f6bffb5008f0cba9cad5ded2caccc64466a6e54", "status": "affected", "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/usb/gadget/function/f_midi2.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-89735", "lastModified": "2026-10-19T09:18:16.227", "metrics": {}, "published": "2026-09-11T20:20:03.967", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f6bffb5008f0cba9cad5ded2caccc64466a6e54"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4beda67ee72e0c8df5b49951dd8b96f6adb25e02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79dbedf40ad930f83839e564394dc5d1a54938c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a15c2acd3083461f91725760e59dff88b33c28f6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: USB gadget MIDI2 driver resource leak leads to denial of service", "id": "2532401", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532401"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's USB gadget MIDI2 driver. The driver fails to properly remove default configuration file system (configfs) groups during teardown, leading to a resource leak. A local attacker could exploit this vulnerability to cause memory exhaustion, potentially resulting in a denial of service (DoS) on the affected system."], "name": "CVE-2026-89735", "public_date": "2026-09-11T19:46:43Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89735\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89735\nhttps://git.kernel.org/stable/c/0f6bffb5008f0cba9cad5ded2caccc64466a6e54\nhttps://git.kernel.org/stable/c/4beda67ee72e0c8df5b49951dd8b96f6adb25e02\nhttps://git.kernel.org/stable/c/9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700\nhttps://git.kernel.org/stable/c/a15c2acd3083461f91725760e59dff88b33c28f6"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b645922b22303cec4628dbbbf6c8553d1cdec87,79dbedf40ad930f83839e564394dc5d1a54938c6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b645922b22303cec4628dbbbf6c8553d1cdec87,4beda67ee72e0c8df5b49951dd8b96f6adb25e02)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b645922b22303cec4628dbbbf6c8553d1cdec87,a15c2acd3083461f91725760e59dff88b33c28f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b645922b22303cec4628dbbbf6c8553d1cdec87,9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b645922b22303cec4628dbbbf6c8553d1cdec87,0f6bffb5008f0cba9cad5ded2caccc64466a6e54)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T08:15:07.025901+00:00", "updated": "2026-09-15T19:30:12.132730+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}