FKIE_CVE-2026-97482

Vulnerability from fkie_nvd - Published: 2026-09-24 17:17 - Updated: 2026-10-03 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: goku_udc: avoid NULL deref of dev->driver in INT_USBRESET log goku_irq() handles a number of bus events under a single ep0 path. It already guards the gadget driver suspend/resume callbacks against a NULL ->driver: if (dev->gadget.speed != USB_SPEED_UNKNOWN && dev->driver && dev->driver->resume) { spin_unlock(&dev->lock); dev->driver->resume(&dev->gadget); ... } but the very next branch unconditionally dereferences dev->driver when an INT_USBRESET arrives: if (stat & INT_USBRESET) { ACK(INT_USBRESET); INFO(dev, "USB reset done, gadget %s\n", dev->driver->driver.name); } If the controller raises INT_USBRESET before any gadget driver has been bound (or after one has been unbound), dev->driver is NULL and the printk dereferences NULL. smatch flags the inconsistency: drivers/usb/gadget/udc/goku_udc.c:1618 goku_irq() error: we previously assumed 'dev->driver' could be null (see line 1607) Fall back to a placeholder when the gadget driver is not bound. No functional change while a gadget driver is bound.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10d7fc3008d5b7ec03af8e08927f1d090014c2af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28d78783a871cdb7a637dcb72452ff7d303430ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5bf5e3fba9bc7dfd69701521dbe9809f8ccbdb02
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/999ff3bf665f2abfb6af519ef3d6d42b061d3c15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a018d4195114ca2cf79858cc45c98581dee4795b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7b33afbf9b54b61cb423af9663df54eae11d3b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea2901a4a90afc662e4d023542d91f10ab10fd3c
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/goku_udc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d7b33afbf9b54b61cb423af9663df54eae11d3b1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ea2901a4a90afc662e4d023542d91f10ab10fd3c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "999ff3bf665f2abfb6af519ef3d6d42b061d3c15",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a018d4195114ca2cf79858cc45c98581dee4795b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "10d7fc3008d5b7ec03af8e08927f1d090014c2af",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "28d78783a871cdb7a637dcb72452ff7d303430ae",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5bf5e3fba9bc7dfd69701521dbe9809f8ccbdb02",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/goku_udc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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: goku_udc: avoid NULL deref of dev-\u003edriver in INT_USBRESET log\n\ngoku_irq() handles a number of bus events under a single ep0 path.\nIt already guards the gadget driver suspend/resume callbacks against a\nNULL -\u003edriver:\n\n\tif (dev-\u003egadget.speed != USB_SPEED_UNKNOWN\n\t\t\t\u0026\u0026 dev-\u003edriver\n\t\t\t\u0026\u0026 dev-\u003edriver-\u003eresume) {\n\t\tspin_unlock(\u0026dev-\u003elock);\n\t\tdev-\u003edriver-\u003eresume(\u0026dev-\u003egadget);\n\t\t...\n\t}\n\nbut the very next branch unconditionally dereferences dev-\u003edriver\nwhen an INT_USBRESET arrives:\n\n\tif (stat \u0026 INT_USBRESET) {\n\t\tACK(INT_USBRESET);\n\t\tINFO(dev, \"USB reset done, gadget %s\\n\",\n\t\t\tdev-\u003edriver-\u003edriver.name);\n\t}\n\nIf the controller raises INT_USBRESET before any gadget driver has\nbeen bound (or after one has been unbound), dev-\u003edriver is NULL and\nthe printk dereferences NULL.\n\nsmatch flags the inconsistency:\n\n  drivers/usb/gadget/udc/goku_udc.c:1618 goku_irq() error:\n  we previously assumed \u0027dev-\u003edriver\u0027 could be null (see line 1607)\n\nFall back to a placeholder when the gadget driver is not bound.\n\nNo functional change while a gadget driver is bound."
    }
  ],
  "id": "CVE-2026-97482",
  "lastModified": "2026-10-03T11:17:58.110",
  "metrics": {},
  "published": "2026-09-24T17:17:25.707",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/10d7fc3008d5b7ec03af8e08927f1d090014c2af"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/28d78783a871cdb7a637dcb72452ff7d303430ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5bf5e3fba9bc7dfd69701521dbe9809f8ccbdb02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/999ff3bf665f2abfb6af519ef3d6d42b061d3c15"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a018d4195114ca2cf79858cc45c98581dee4795b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d7b33afbf9b54b61cb423af9663df54eae11d3b1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ea2901a4a90afc662e4d023542d91f10ab10fd3c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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