CVE-2025-21776 (GCVE-0-2025-21776)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2026-01-02 15:28
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: hub: Ignore non-compliant devices with too many configs or interfaces Robert Morris created a test program which can cause usb_hub_to_struct_hub() to dereference a NULL or inappropriate pointer: Oops: general protection fault, probably for non-canonical address 0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI CPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14 Hardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110 ... Call Trace: <TASK> ? die_addr+0x31/0x80 ? exc_general_protection+0x1b4/0x3c0 ? asm_exc_general_protection+0x26/0x30 ? usb_hub_adjust_deviceremovable+0x78/0x110 hub_probe+0x7c7/0xab0 usb_probe_interface+0x14b/0x350 really_probe+0xd0/0x2d0 ? __pfx___device_attach_driver+0x10/0x10 __driver_probe_device+0x6e/0x110 driver_probe_device+0x1a/0x90 __device_attach_driver+0x7e/0xc0 bus_for_each_drv+0x7f/0xd0 __device_attach+0xaa/0x1a0 bus_probe_device+0x8b/0xa0 device_add+0x62e/0x810 usb_set_configuration+0x65d/0x990 usb_generic_driver_probe+0x4b/0x70 usb_probe_device+0x36/0xd0 The cause of this error is that the device has two interfaces, and the hub driver binds to interface 1 instead of interface 0, which is where usb_hub_to_struct_hub() looks. We can prevent the problem from occurring by refusing to accept hub devices that violate the USB spec by having more than one configuration or interface.
References
Impacted products
Vendor Product Version
Linux Linux Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
Version: d2123fd9e1a56b8006986ed37e0aaf93ef0dd978
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            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: hub: Ignore non-compliant devices with too many configs or interfaces\n\nRobert Morris created a test program which can cause\nusb_hub_to_struct_hub() to dereference a NULL or inappropriate\npointer:\n\nOops: general protection fault, probably for non-canonical address\n0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI\nCPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14\nHardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021\nWorkqueue: usb_hub_wq hub_event\nRIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110\n...\nCall Trace:\n \u003cTASK\u003e\n ? die_addr+0x31/0x80\n ? exc_general_protection+0x1b4/0x3c0\n ? asm_exc_general_protection+0x26/0x30\n ? usb_hub_adjust_deviceremovable+0x78/0x110\n hub_probe+0x7c7/0xab0\n usb_probe_interface+0x14b/0x350\n really_probe+0xd0/0x2d0\n ? __pfx___device_attach_driver+0x10/0x10\n __driver_probe_device+0x6e/0x110\n driver_probe_device+0x1a/0x90\n __device_attach_driver+0x7e/0xc0\n bus_for_each_drv+0x7f/0xd0\n __device_attach+0xaa/0x1a0\n bus_probe_device+0x8b/0xa0\n device_add+0x62e/0x810\n usb_set_configuration+0x65d/0x990\n usb_generic_driver_probe+0x4b/0x70\n usb_probe_device+0x36/0xd0\n\nThe cause of this error is that the device has two interfaces, and the\nhub driver binds to interface 1 instead of interface 0, which is where\nusb_hub_to_struct_hub() looks.\n\nWe can prevent the problem from occurring by refusing to accept hub\ndevices that violate the USB spec by having more than one\nconfiguration or interface."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-02T15:28:35.430Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218"
        },
        {
          "url": "https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897"
        },
        {
          "url": "https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e"
        },
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          "url": "https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef"
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          "url": "https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490"
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        {
          "url": "https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d"
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      "title": "USB: hub: Ignore non-compliant devices with too many configs or interfaces",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21776",
    "datePublished": "2025-02-27T02:18:21.503Z",
    "dateReserved": "2024-12-29T08:45:45.763Z",
    "dateUpdated": "2026-01-02T15:28:35.430Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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