{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3"
            },
            {
              "fixed": "321bb0eb1486a0d575f02e24e3f4170e408c2f51"
            },
            {
              "fixed": "3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2"
            },
            {
              "fixed": "a285fa3780c768dcc51c76768707d099a2cc611d"
            },
            {
              "fixed": "6aaf6dbf54fdfae096f3f90a79e9614e46579280"
            },
            {
              "fixed": "70cf773cca30a10b4964c24520a71279c974b899"
            },
            {
              "fixed": "3eee4c21931dc048ce63b86809f04e4e6f0dcad5"
            },
            {
              "fixed": "6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217"
            },
            {
              "fixed": "8a742141f7ab84975aa758b775567ef4740ef0cf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.28"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92521.json"
  },
  "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-\u003edriver_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-\u003edriver_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-\u003edriver_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.",
  "id": "CVE-2026-92521",
  "modified": "2026-09-19T03:30:42.863002765Z",
  "published": "2026-09-17T16:10:28.144Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92521.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92521"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root"
}