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        "ecosystem": "Linux",
        "name": "Kernel"
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  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31756.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()\n\ndwc2_gadget_exit_clock_gating() internally calls call_gadget() macro,\nwhich expects hsotg-\u003elock to be held since it does spin_unlock/spin_lock\naround the gadget driver callback invocation.\n\nHowever, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating()\nwithout holding the lock. This leads to:\n - spin_unlock on a lock that is not held (undefined behavior)\n - The lock remaining held after dwc2_gadget_exit_clock_gating() returns,\n   causing a deadlock when spin_lock_irqsave() is called later in the\n   same function.\n\nFix this by acquiring hsotg-\u003elock before calling\ndwc2_gadget_exit_clock_gating() and releasing it afterwards, which\nsatisfies the locking requirement of the call_gadget() macro.",
  "id": "CVE-2026-31756",
  "modified": "2026-07-08T05:37:47.642230714Z",
  "published": "2026-05-01T14:14:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31756.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31756"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()"
}