CVE-2026-90021 (GCVE-0-2026-90021)
Vulnerability from cvelistv5
Published
2026-09-16 10:33
Modified
2026-10-21 12:49
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_midi: initialize work in f_midi_alloc() f_midi_alloc initializes free_ref to 1 and it can only be incremented when a sound card is registered via f_midi_register_card(). f_midi_register_card() is only called in f_midi_bind() which actually performs INIT_WORK. If f_midi_bind() is never run, work is not initialized and the if condition in f_midi_free becomes true, this results in a warning later in __flush_work as work->func = 0. Fix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().
References
Impacted products
Vendor Product Version
Linux Linux Version: 8653d71ce3763aedcf3d2331f59beda3fecd79e4
Version: 8653d71ce3763aedcf3d2331f59beda3fecd79e4
Version: 8653d71ce3763aedcf3d2331f59beda3fecd79e4
Version: 8653d71ce3763aedcf3d2331f59beda3fecd79e4
Version: 8653d71ce3763aedcf3d2331f59beda3fecd79e4
Version: 89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d
Version: 3635523e9b96213969693c320302d536774d8e9b
Version: 5.4.291   ≤
Version: 5.10.235   ≤
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/usb/gadget/function/f_midi.c"
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "nodes": [
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      "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-\u003efunc = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:49:27.661Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/13e9f5a91360952b9b5bbc2367fc29d4a4ff2824"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317"
        },
        {
          "url": "https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167"
        },
        {
          "url": "https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002"
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        {
          "url": "https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea"
        }
      ],
      "title": "usb: gadget: f_midi: initialize work in f_midi_alloc()",
      "x_generator": {
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  },
  "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": "2026-10-21T12:49:27.661Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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