{"api_version":"1","generated_at":"2026-10-01T19:11:56+00:00","cve":"CVE-2026-90021","urls":{"html":"https://cve.report/CVE-2026-90021","api":"https://cve.report/api/cve/CVE-2026-90021.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90021","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90021"},"summary":{"title":"usb: gadget: f_midi: initialize work in f_midi_alloc()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi: initialize work in f_midi_alloc()\n\nf_midi_alloc initializes free_ref to 1 and it can only be incremented\nwhen a sound card is registered via f_midi_register_card().\nf_midi_register_card() is only called in f_midi_bind() which actually\nperforms INIT_WORK. If f_midi_bind() is never run, work is not\ninitialized and the if condition in f_midi_free becomes true,\nthis results in a warning later in __flush_work as work->func = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:17:15","updated_at":"2026-09-16 11:17:15"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167","name":"https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317","name":"https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea","name":"https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002","name":"https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90021","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90021","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8653d71ce3763aedcf3d2331f59beda3fecd79e4 3d8b11255e632170f32f1925bfcaf96331f36317 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8653d71ce3763aedcf3d2331f59beda3fecd79e4 02ac76f27db23ef652358458c272d9d2d6f51167 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8653d71ce3763aedcf3d2331f59beda3fecd79e4 858576de6b2f5166b08dae803f0fd0766dcb3002 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8653d71ce3763aedcf3d2331f59beda3fecd79e4 7e07d3e4c389217d7d7171d80edf2e23ac70f1ea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3635523e9b96213969693c320302d536774d8e9b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.291 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.235 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.12 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-rc2 * 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/usb/gadget/function/f_midi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3d8b11255e632170f32f1925bfcaf96331f36317","status":"affected","version":"8653d71ce3763aedcf3d2331f59beda3fecd79e4","versionType":"git"},{"lessThan":"02ac76f27db23ef652358458c272d9d2d6f51167","status":"affected","version":"8653d71ce3763aedcf3d2331f59beda3fecd79e4","versionType":"git"},{"lessThan":"858576de6b2f5166b08dae803f0fd0766dcb3002","status":"affected","version":"8653d71ce3763aedcf3d2331f59beda3fecd79e4","versionType":"git"},{"lessThan":"7e07d3e4c389217d7d7171d80edf2e23ac70f1ea","status":"affected","version":"8653d71ce3763aedcf3d2331f59beda3fecd79e4","versionType":"git"},{"status":"affected","version":"89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d","versionType":"git"},{"status":"affected","version":"3635523e9b96213969693c320302d536774d8e9b","versionType":"git"},{"lessThan":"5.5","status":"affected","version":"5.4.291","versionType":"semver"},{"lessThan":"5.11","status":"affected","version":"5.10.235","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/gadget/function/f_midi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","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-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc2","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.291","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.235","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi: initialize work in f_midi_alloc()\n\nf_midi_alloc initializes free_ref to 1 and it can only be incremented\nwhen a sound card is registered via f_midi_register_card().\nf_midi_register_card() is only called in f_midi_bind() which actually\nperforms INIT_WORK. If f_midi_bind() is never run, work is not\ninitialized and the if condition in f_midi_free becomes true,\nthis results in a warning later in __flush_work as work->func = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc()."}],"providerMetadata":{"dateUpdated":"2026-09-16T10:33:25.560Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317"},{"url":"https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167"},{"url":"https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002"},{"url":"https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea"}],"title":"usb: gadget: f_midi: initialize work in f_midi_alloc()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90021","datePublished":"2026-09-16T10:33:25.560Z","dateReserved":"2026-09-11T19:38:34.781Z","dateUpdated":"2026-09-16T10:33:25.560Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:17:15","lastModifiedDate":"2026-09-16 11:17:15","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90021","Ordinal":"1","Title":"usb: gadget: f_midi: initialize work in f_midi_alloc()","CVE":"CVE-2026-90021","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90021","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi: initialize work in f_midi_alloc()\n\nf_midi_alloc initializes free_ref to 1 and it can only be incremented\nwhen a sound card is registered via f_midi_register_card().\nf_midi_register_card() is only called in f_midi_bind() which actually\nperforms INIT_WORK. If f_midi_bind() is never run, work is not\ninitialized and the if condition in f_midi_free becomes true,\nthis results in a warning later in __flush_work as work->func = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().","Type":"Description","Title":"usb: gadget: f_midi: initialize work in f_midi_alloc()"}]}}}