Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 10:33

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 mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/3d8b11255e632170f…
https://git.kernel.org/stable/c/02ac76f27db23ef65…
https://git.kernel.org/stable/c/858576de6b2f5166b…
https://git.kernel.org/stable/c/7e07d3e4c389217d7…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	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
Linux	Linux	Affected: 5.12 Unaffected: 0 , < 5.12 (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-rc2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "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",
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            },
            {
              "status": "affected",
              "version": "3635523e9b96213969693c320302d536774d8e9b",
              "versionType": "git"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.291",
              "versionType": "semver"
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            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.235",
              "versionType": "semver"
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              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
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              "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:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
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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": "2026-09-16T10:33:25.560Z",
        "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",
  "vulnerability-lookup:meta": {
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  }
}

FKIE_CVE-2026-90021

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 11:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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()."
    }
  ],
  "id": "CVE-2026-90021",
  "lastModified": "2026-09-16T11:17:15.030",
  "metrics": {},
  "published": "2026-09-16T11:17:15.030",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-9V89-J77V-QGFM

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

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().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-90021"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:15Z",
    "severity": null
  },
  "details": "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": "GHSA-9v89-j77v-qgfm",
  "modified": "2026-09-16T12:30:45Z",
  "published": "2026-09-16T12:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-90021

GHSA-9V89-J77V-QGFM

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Related by attack behaviour