{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-40070",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-40070"
  ],
  "published": "2025-10-28T11:50:45Z",
  "summary": "pps: fix warning in pps_register_cdev when register device fail",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n  RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Call Trace:\n   <TASK>\n   kobject_cleanup+0x136/0x410 lib/kobject.c:689\n   kobject_release lib/kobject.c:720 [inline]\n   kref_put include/linux/kref.h:65 [inline]\n   kobject_put+0xe9/0x130 lib/kobject.c:737\n   put_device+0x24/0x30 drivers/base/core.c:3797\n   pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n   pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n   pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n   tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n   tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n   tiocsetd drivers/tty/tty_io.c:2429 [inline]\n   tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:598 [inline]\n   __se_sys_ioctl fs/ioctl.c:584 [inline]\n   __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure case.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40070"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/38c7bb10aae5118dd48fa7a82f7bf93839bcc320"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2a194707ca27a3b0523023fa8b446e5ec922dc51"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/125527db41805693208ee1aacd7f3ffe6a3a489c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f01fa3588e0b3cb1540f56d2c6bd99e5b3810234"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0f97564a1fb62f34b3b498e2f12caffbe99c004a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b0531cdba5029f897da5156815e3bdafe1e9b88d"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
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}