{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-92521",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-92521"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root\n\nacpi_pci_root_add() assigns the freshly allocated root to\ndevice->driver_data before dmar_device_add() and pci_acpi_scan_root().\nBoth failure paths reach the end: label where root is kfree()'d, but\nonly the pci_acpi_scan_root() path clears driver_data first.\n\nWhen dmar_device_add() fails during a hot-add, root is freed while\ndevice->driver_data still points at it.  The ACPI core does not clear\ndriver_data on attach failure, so a later acpi_pci_find_root() call may\ndereference this dangling pointer.\n\nacpi_pci_root_remove() has the same problem: it frees root without\nclearing device->driver_data, leaving a dangling pointer behind after\nthe root bridge is removed.\n\nMove the NULL assignment to the shared end: label so every error path in\nacpi_pci_root_add() clears driver_data before freeing root, and clear it\nin acpi_pci_root_remove() as well, so the object is never left reachable\nthrough driver_data after being freed.",
  "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": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-92521"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-17T16:10:40Z"
  }
}