{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-90021",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90021",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T10:33:25.560Z",
    "updatedAt": "2026-10-21T12:49:27.661Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "usb: gadget: f_midi: initialize work in f_midi_alloc()",
      "summary": "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().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "13e9f5a91360952b9b5bbc2367fc29d4a4ff2824"
            },
            {
              "version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3d8b11255e632170f32f1925bfcaf96331f36317"
            },
            {
              "version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "02ac76f27db23ef652358458c272d9d2d6f51167"
            },
            {
              "version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "858576de6b2f5166b08dae803f0fd0766dcb3002"
            },
            {
              "version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7e07d3e4c389217d7d7171d80edf2e23ac70f1ea"
            },
            {
              "version": "89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3635523e9b96213969693c320302d536774d8e9b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.4.291",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.235",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.51",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}