USB: hub: Ignore non-compliant devices with too many configs or interfaces

{
  "id": "aa0a9d77d67c37b61898778997c9aa3c640dce03a90a24bc6cefe16b0f5e2746",
  "url": "https://osv.dev/vulnerability/CVE-2025-21776",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "USB: hub: Ignore non-compliant devices with too many configs or interfaces",
    "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: ? 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 configurati",
    "evidence": "osv:CVE-2025-21776",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.291",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.235",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.179",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.129",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.79",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-21776",
      "aliases": [
        "CVE-2025-21776"
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "d2123fd9e1a56b8006986ed37e0aaf93ef0dd978"
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                {
                  "fixed": "49f077106fa07919a6a6dda99bb490dd1d1a8218"
                },
                {
                  "fixed": "d343fe0fad5c1d689775f2dda24a85ce98e29566"
                },
                {
                  "fixed": "d3a67adb365cdfdac4620daf38a82e57ca45806c"
                },
                {
                  "fixed": "c3720b04df84b5459050ae4e03ec7d545652f897"
                },
                {
                  "fixed": "e905a0fca7bff0855d312c16f71e60e1773b393e"
                },
                {
                  "fixed": "62d8f4c5454dd39aded4f343720d1c5a1803cfef"
                },
                {
                  "fixed": "5b9778e1fe715700993ce436c152dc3b7df0b490"
                },
                {
                  "fixed": "2240fed37afbcdb5e8b627bc7ad986891100e05d"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21776.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.9.0"
                },
                {
                  "fixed": "5.4.291"
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              ]
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.5.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.11.0"
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                {
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              ]
            },
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                  "introduced": "5.16.0"
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                  "fixed": "6.1.129"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
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                  "fixed": "6.6.79"
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            },
            {
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              "events": [
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                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.16"
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              ]
            },
            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.4"
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              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21776.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.190693536Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-503939.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d",
        "https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218",
        "https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490",
        "https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef",
        "https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897",
        "https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566",
        "https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c",
        "https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21776.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21776",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21776.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21776",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519630,
  "published_at": "2025-02-27T02:18:21.503+00:00"
}