{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "00596576a05145a1b5672897a82ef87af00becf4"
            },
            {
              "fixed": "f6016557f1ef7735963bd8691592d2797bbf91d2"
            },
            {
              "fixed": "616dc895d982026f41f500c88d1bfea004938cc8"
            },
            {
              "fixed": "56570bdad5e31c5c538cd6efff5c4510256e1bb4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50457.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: core: Fix refcount error in del_mtd_device()\n\ndel_mtd_device() will call of_node_put() to mtd_get_of_node(mtd), which\nis mtd-\u003edev.of_node. However, memset(\u0026mtd-\u003edev, 0) is called before\nof_node_put(). As the result, of_node_put() won't do anything in\ndel_mtd_device(), and causes the refcount leak.\n\ndel_mtd_device()\n    memset(\u0026mtd-\u003edev, 0, sizeof(mtd-\u003edev) # clear mtd-\u003edev\n    of_node_put()\n        mtd_get_of_node(mtd) # mtd-\u003edev is cleared, can't locate of_node\n                             # of_node_put(NULL) won't do anything\n\nFix the error by caching the pointer of the device_node.\n\nOF: ERROR: memory leak, expected refcount 1 instead of 2,\nof_node_get()/of_node_put() unbalanced - destroy cset entry: attach\noverlay node /spi/spi-sram@0\nCPU: 3 PID: 275 Comm: python3 Tainted: G N 6.1.0-rc3+ #54\n    0d8a1edddf51f172ff5226989a7565c6313b08e2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\nCall Trace:\n\u003cTASK\u003e\n    dump_stack_lvl+0x67/0x83\n    kobject_get+0x155/0x160\n    of_node_get+0x1f/0x30\n    of_fwnode_get+0x43/0x70\n    fwnode_handle_get+0x54/0x80\n    fwnode_get_nth_parent+0xc9/0xe0\n    fwnode_full_name_string+0x3f/0xa0\n    device_node_string+0x30f/0x750\n    pointer+0x598/0x7a0\n    vsnprintf+0x62d/0x9b0\n    ...\n    cfs_overlay_release+0x30/0x90\n    config_item_release+0xbe/0x1a0\n    config_item_put+0x5e/0x80\n    configfs_rmdir+0x3bd/0x540\n    vfs_rmdir+0x18c/0x320\n    do_rmdir+0x198/0x330\n    __x64_sys_rmdir+0x2c/0x40\n    do_syscall_64+0x37/0x90\n    entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n[\u003cmiquel.raynal@bootlin.com\u003e: Light reword of the commit log]",
  "id": "CVE-2022-50457",
  "modified": "2026-04-01T23:10:29.524964384Z",
  "published": "2025-10-01T11:45:30.263Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/56570bdad5e31c5c538cd6efff5c4510256e1bb4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/616dc895d982026f41f500c88d1bfea004938cc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6016557f1ef7735963bd8691592d2797bbf91d2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50457.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50457"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "mtd: core: Fix refcount error in del_mtd_device()"
}