ghsa-97mp-32j5-q87r
Vulnerability from github
Published
2024-04-03 15:30
Modified
2024-04-03 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend

In current scenario if Plug-out and Plug-In performed continuously there could be a chance while checking for dwc->gadget_driver in dwc3_gadget_suspend, a NULL pointer dereference may occur.

Call Stack:

CPU1:                           CPU2:
gadget_unbind_driver            dwc3_suspend_common
dwc3_gadget_stop                dwc3_gadget_suspend
                                    dwc3_disconnect_gadget

CPU1 basically clears the variable and CPU2 checks the variable. Consider CPU1 is running and right before gadget_driver is cleared and in parallel CPU2 executes dwc3_gadget_suspend where it finds dwc->gadget_driver which is not NULL and resumes execution and then CPU1 completes execution. CPU2 executes dwc3_disconnect_gadget where it checks dwc->gadget_driver is already NULL because of which the NULL pointer deference occur.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-26715"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-03T15:15:53Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend\n\nIn current scenario if Plug-out and Plug-In performed continuously\nthere could be a chance while checking for dwc-\u003egadget_driver in\ndwc3_gadget_suspend, a NULL pointer dereference may occur.\n\nCall Stack:\n\n\tCPU1:                           CPU2:\n\tgadget_unbind_driver            dwc3_suspend_common\n\tdwc3_gadget_stop                dwc3_gadget_suspend\n                                        dwc3_disconnect_gadget\n\nCPU1 basically clears the variable and CPU2 checks the variable.\nConsider CPU1 is running and right before gadget_driver is cleared\nand in parallel CPU2 executes dwc3_gadget_suspend where it finds\ndwc-\u003egadget_driver which is not NULL and resumes execution and then\nCPU1 completes execution. CPU2 executes dwc3_disconnect_gadget where\nit checks dwc-\u003egadget_driver is already NULL because of which the\nNULL pointer deference occur.",
  "id": "GHSA-97mp-32j5-q87r",
  "modified": "2024-04-03T15:30:43Z",
  "published": "2024-04-03T15:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26715"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36695d5eeeefe5a64b47d0336e7c8fc144e78182"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57e2e42ccd3cd6183228269715ed032f44536751"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61a348857e869432e6a920ad8ea9132e8d44c316"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88936ceab6b426f1312327e9ef849c215c6007a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7ebd8149ee519d27232e6e4940e9c02071b568b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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