{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-37905",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-37905"
  ],
  "published": "2025-05-20T15:22:31Z",
  "summary": "firmware: arm_scmi: Balance device refcount when destroying devices",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Balance device refcount when destroying devices\n\nUsing device_find_child() to lookup the proper SCMI device to destroy\ncauses an unbalance in device refcount, since device_find_child() calls an\nimplicit get_device(): this, in turns, inhibits the call of the provided\nrelease methods upon devices destruction.\n\nAs a consequence, one of the structures that is not freed properly upon\ndestruction is the internal struct device_private dev->p populated by the\ndrivers subsystem core.\n\nKMemleak detects this situation since loading/unloding some SCMI driver\ncauses related devices to be created/destroyed without calling any\ndevice_release method.\n\nunreferenced object 0xffff00000f583800 (size 512):\n  comm \"insmod\", pid 227, jiffies 4294912190\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 60 36 1d 8a 00 80 ff ff  ........`6......\n  backtrace (crc 114e2eed):\n    kmemleak_alloc+0xbc/0xd8\n    __kmalloc_cache_noprof+0x2dc/0x398\n    device_add+0x954/0x12d0\n    device_register+0x28/0x40\n    __scmi_device_create.part.0+0x1bc/0x380\n    scmi_device_create+0x2d0/0x390\n    scmi_create_protocol_devices+0x74/0xf8\n    scmi_device_request_notifier+0x1f8/0x2a8\n    notifier_call_chain+0x110/0x3b0\n    blocking_notifier_call_chain+0x70/0xb0\n    scmi_driver_register+0x350/0x7f0\n    0xffff80000a3b3038\n    do_one_initcall+0x12c/0x730\n    do_init_module+0x1dc/0x640\n    load_module+0x4b20/0x5b70\n    init_module_from_file+0xec/0x158\n\n$ ./scripts/faddr2line ./vmlinux device_add+0x954/0x12d0\ndevice_add+0x954/0x12d0:\nkmalloc_noprof at include/linux/slab.h:901\n(inlined by) kzalloc_noprof at include/linux/slab.h:1037\n(inlined by) device_private_init at drivers/base/core.c:3510\n(inlined by) device_add at drivers/base/core.c:3561\n\nBalance device refcount by issuing a put_device() on devices found via\ndevice_find_child().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.138",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-37905"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/91ff1e9652fb9beb0174267d6bb38243dff211bb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ff4273d47da81b95ed9396110bcbd1b7b7470fe8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/969d8beaa2e374387bf9aa5602ef84fc50bb48d8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8a8a3547d5c4960da053df49c75bf623827a25da"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9ca67840c0ddf3f39407339624cef824a4f27599"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}