Vulnerability-Lookup

GHSA-GF8H-9QPM-2GF3

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: fix NULL pointer dereference in gadget_dev_ioctl()

gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but dev->state is checked after acquiring the lock. Therefore a concurrent bind can change the device state between these operations, which can leave ioctl with a stale NULL gadget pointer and causing a NULL pointer dereference at gadget->ops->ioctl.

Read dev->gadget while holding dev->lock so that the gadget pointer and device state are sampled consistently.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90020"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()\n\ngadget_dev_ioctl() reads dev-\u003egadget before acquiring dev-\u003elock, but\ndev-\u003estate is checked after acquiring the lock. Therefore a concurrent\nbind can change the device state between these operations, which can\nleave ioctl with a stale NULL gadget pointer and causing a NULL pointer\ndereference at gadget-\u003eops-\u003eioctl.\n\nRead dev-\u003egadget while holding dev-\u003elock so that the gadget pointer\nand device state are sampled consistently.",
  "id": "GHSA-gf8h-9qpm-2gf3",
  "modified": "2026-09-16T12:30:45Z",
  "published": "2026-09-16T12:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90020"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/162178ca83c3de986900385a0477eb539f8e1a7e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ec019bf9a8b12f53b9f2777d65aadb730b5a84"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd0eed9e165b1a6292f49e622e3dd0b7d99b106d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e8219accce2f6d3502ed71f5b5e854ecf27249a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebd916fdfefaacbc0e577f7037ec96b31a105e5f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90020 (GCVE-0-2026-90020)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-17 09:29

Title

USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

Summary

In the Linux kernel, the following vulnerability has been resolved: USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl() gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but dev->state is checked after acquiring the lock. Therefore a concurrent bind can change the device state between these operations, which can leave ioctl with a stale NULL gadget pointer and causing a NULL pointer dereference at gadget->ops->ioctl. Read dev->gadget while holding dev->lock so that the gadget pointer and device state are sampled consistently.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/8be30959be31b4205…
https://git.kernel.org/stable/c/e8219accce2f6d350…
https://git.kernel.org/stable/c/87cbf9410b12f5c2d…
https://git.kernel.org/stable/c/162178ca83c3de986…
https://git.kernel.org/stable/c/ebd916fdfefaacbc0…
https://git.kernel.org/stable/c/c29a83c1ff3f06d57…
https://git.kernel.org/stable/c/64ec019bf9a8b12f5…
https://git.kernel.org/stable/c/dd0eed9e165b1a629…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e8219accce2f6d3502ed71f5b5e854ecf27249a6 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 162178ca83c3de986900385a0477eb539f8e1a7e (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ebd916fdfefaacbc0e577f7037ec96b31a105e5f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 64ec019bf9a8b12f53b9f2777d65aadb730b5a84 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dd0eed9e165b1a6292f49e622e3dd0b7d99b106d (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 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-rc2 , ≤ * (original_commit_for_fix)

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          "programFiles": [
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      "title": "USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()",
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}

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.
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