{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21916",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21916"
  ],
  "published": "2025-04-01T15:40:16Z",
  "summary": "usb: atm: cxacru: fix a flaw in existing endpoint checks",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: atm: cxacru: fix a flaw in existing endpoint checks\n\nSyzbot once again identified a flaw in usb endpoint checking, see [1].\nThis time the issue stems from a commit authored by me (2eabb655a968\n(\"usb: atm: cxacru: fix endpoint checking in cxacru_bind()\")).\n\nWhile using usb_find_common_endpoints() may usually be enough to\ndiscard devices with wrong endpoints, in this case one needs more\nthan just finding and identifying the sufficient number of endpoints\nof correct types - one needs to check the endpoint's address as well.\n\nSince cxacru_bind() fills URBs with CXACRU_EP_CMD address in mind,\nswitch the endpoint verification approach to usb_check_XXX_endpoints()\ninstead to fix incomplete ep testing.\n\n[1] Syzbot report:\nusb 5-1: BOGUS urb xfer, pipe 3 != type 1\nWARNING: CPU: 0 PID: 1378 at drivers/usb/core/urb.c:504 usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503\n...\nRIP: 0010:usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503\n...\nCall Trace:\n <TASK>\n cxacru_cm+0x3c8/0xe50 drivers/usb/atm/cxacru.c:649\n cxacru_card_status drivers/usb/atm/cxacru.c:760 [inline]\n cxacru_bind+0xcf9/0x1150 drivers/usb/atm/cxacru.c:1223\n usbatm_usb_probe+0x314/0x1d30 drivers/usb/atm/usbatm.c:1058\n cxacru_usb_probe+0x184/0x220 drivers/usb/atm/cxacru.c:1377\n usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396\n really_probe+0x2b9/0xad0 drivers/base/dd.c:658\n __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800\n driver_probe_device+0x50/0x430 drivers/base/dd.c:830\n...",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.6.47-1+rpt1",
        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3",
        "1:6.6.62-1+rpt1",
        "1:6.6.74-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.6.47+rpt-rpi-2712",
            "binary_version": "1:6.6.47-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.47+rpt-rpi-v6",
            "binary_version": "1:6.6.47-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.47+rpt-rpi-v7",
            "binary_version": "1:6.6.47-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.47+rpt-rpi-v7l",
            "binary_version": "1:6.6.47-1+rpt1"
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          },
          {
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          {
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          },
          {
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      "database_specific": {
        "per_version": {
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            "linux_commit": "cf64a1dfecc2dc418efdd61701c1a4b185ab4761",
            "upstream_version": "6.6.47",
            "assessment": "commit ancestry (strak rule)",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21916"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dcd592ab9dd8a2bfc36e75583b9006db2a77ec24"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/319529e0356bd904528c64647725a2272d297c83"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bf4409f84023b52b5e9b36c0a071a121eee42138"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/197e78076c5ecd895f109158c4ea2954b9919af6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a0475a885d69849b1ade38add6d64338dfa83a8f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cfc295f7cccf66cbd5123416bcf1bee2e1bd37de"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/903b80c21458bb1e34c3a78c5fdc553821e357f8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c90aad369899a607cfbc002bebeafd51e31900cd"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
  }
}