CVE-2026-90021 (GCVE-0-2026-90021)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-10-30 12:33
VLAI
Title
usb: gadget: f_midi: initialize work in f_midi_alloc()
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().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < c76e82b026a28c348e5d841922aa73db36eca1d3 (git)
Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < 13e9f5a91360952b9b5bbc2367fc29d4a4ff2824 (git)
Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < 3d8b11255e632170f32f1925bfcaf96331f36317 (git)
Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < 02ac76f27db23ef652358458c272d9d2d6f51167 (git)
Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < 858576de6b2f5166b08dae803f0fd0766dcb3002 (git)
Affected: 8653d71ce3763aedcf3d2331f59beda3fecd79e4 , < 7e07d3e4c389217d7d7171d80edf2e23ac70f1ea (git)
Affected: 89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d (git)
Affected: 3635523e9b96213969693c320302d536774d8e9b (git)
Affected: 5.4.291 , < 5.5 (semver)
Affected: 5.10.235 , < 5.11 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "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()."
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            "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()."
          }
        ],
        "id": "CVE-2026-90021",
        "lastModified": "2026-10-30T13:20:39.007",
        "metrics": {},
        "published": "2026-09-16T11:17:15.030",
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      "current_release_date": "2026-11-06T01:28:11+00:00",
      "cve": "CVE-2026-90021",
      "id": "CVE-2026-90021",
      "initial_release_date": "2026-09-16T00:00:00+00:00",
      "product_status:known_not_affected": "203",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: gadget: f_midi: initialize work in f_midi_alloc()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90021.json",
      "version": "3"
    }
  }
}



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