{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68461",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-68461"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "device property: initialize the remaining fields of fwnode_handle in fwnode_init()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevice property: initialize the remaining fields of fwnode_handle in fwnode_init()\n\nIf a firmware node is allocated on the stack (for instance: temporary\nsoftware node whose life-time we control) or on the heap - but using a\nnon-zeroing allocation function - and initialized using fwnode_init(),\nits secondary pointer will contain uninitialized memory which likely\nwill be neither NULL nor IS_ERR() and so may end up being dereferenced\n(for example: in dev_to_swnode()). Set fwnode->secondary to NULL on\ninitialization. While at it: initialize the remaining fields of struct\nfwnode_handle too just to be sure.\n\n[ Fix typo in commit message. - Danilo ]",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The flaw is in fwnode_init() in the driver-core firmware-node layer; uninitialized fwnode->secondary is consumed in dev_to_swnode() and fwnode_property_*() during local device probe, property lookups, and configfs-driven gpio-sim/gpio-virtuser software-node creation\u2014never from a network packet or remote protocol handler.\nAC:L - Once a fwnode_handle is placed in non-zeroed stack or kmalloc storage and passed through fwnode_init(), the uninitialized secondary pointer is deterministically non-NULL and non-IS_ERR(), and property helpers immediately pass it to fwnode_call_*_op() without further validation\u2014no race, heap grooming, or victim timing is required.\nPR:L - No init-namespace root is required to reach the dereference paths: fwnode_property_present() and dev_to_swnode() run during automatic driver probe/bind and consumer property resolution (GPIO/IIO/reset/v4l2-fwnode) that a local unprivileged user can trigger by opening device nodes or causing driver binding on embedded/Android systems using software nodes.\nUI:N - The garbage secondary pointer is dereferenced automatically inside kernel property lookups and dev_to_swnode() during probe or device registration; no separate victim action such as mounting media, clicking a prompt, or opening a malicious file is needed beyond the affected driver path executing.\nS:U - Impact is confined to kernel memory corruption and crashes within the host kernel's own security authority during firmware-node property handling; it does not cross VM, IOMMU, container, or sandbox boundaries.\nC:H - An uninitialized secondary is treated as a live fwnode_handle pointer; fwnode_call_bool_op()/fwnode_call_int_op() evaluate fwnode->ops on attacker-influenced stack or slab residue, reading kernel memory through misinterpreted ops tables rather than a bounded disclosure.\nI:H - The same garbage secondary is passed into fwnode_call_*_op() and set_secondary_fwnode()/fwnode_is_primary() logic; a non-NULL, non-ERR value with plausible ops and list-head residue enables indirect calls and list manipulation\u2014control-flow-relevant memory corruption per CNA guidance for uninitialized pointer use in fwnode plumbing.\nA:H - Dereferencing an uninitialized secondary in dev_to_swnode() or fwnode_property_*() causes an immediate kernel oops/panic from a bad pointer or invalid ops dispatch; the fault is repeatable whenever the affected fwnode initialization path is exercised."
    }
  }
}