{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-97450",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-97450"
  ],
  "published": "2026-09-24T16:08:25Z",
  "summary": "ACPICA: validate handler object type in two places",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: validate handler object type in two places\n\nACPICA: validate handler object type in acpi_ev_has_default_handler()\nand acpi_ev_find_region_handler().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "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": "6.1.189",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-97450"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7af2da201623ab5bc0773bd3eeb2f2345cfa1c4a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9d9fbf6b895a23238e4a7b1a3230f648f0d952a1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e98825650c2eb1605c707fd1391ceed65bb8e481"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/254e304f68dc079906ce2df4723548ffe35f682a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bfd981d35ed3156414fd35b4fe311d5d25cbfca6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4c977d57a784682dc8c6cce2f9253ef44ec28ae8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c5296da2d516707862f8a2dbb4b515f777e5294f"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-03T11:04:09Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.4,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The malformed AML that leaves a non-ACPI_TYPE_LOCAL_ADDRESS_HANDLER object as common_notify.handler arrives in a DSDT/SSDT. acpi_ev_find_region_handler() is reached from acpi_ev_install_space_handler() via acpi_install_address_space_handler(ACPI_ROOT_OBJECT) in ec_install_handlers()/acpi_ipmi_init(), and from acpi_ev_initialize_region() during acpi_tb_load_namespace(); no network message carries those bytes.\nAC:L - acpi_ev_install_space_handler() skips the DEVICE/PROCESSOR/THERMAL type check for acpi_gbl_root_node, so CopyObject of a Buffer onto `\\` makes obj_desc->common_notify.handler overlay Buffer.aml_start. A later handler install or OperationRegion init walks address_space.next on every run; the table author sets those objects and no race is required.\nPR:N - acpi_bus_init() calls acpi_load_tables() which executes module-level AML, then acpi_initialize_objects() \u2192 acpi_ev_initialize_op_regions() \u2192 acpi_ev_has_default_handler(acpi_gbl_root_node), and ec_install_handlers() calls acpi_install_address_space_handler(ACPI_ROOT_OBJECT) with no capable() check; a compromised DSDT/SSDT needs no Linux account.\nUI:N - Module-level AML runs in acpi_ns_execute_table() during acpi_load_tables(), and acpi_ev_find_region_handler() then runs from acpi_ev_initialize_op_regions() and from EC/IPMI/PCC handler install in boot/probe; that is ordinary power-on with no mount or file-open by a victim.\nS:U - The type-confused walk in acpi_ev_find_region_handler()/acpi_ev_has_default_handler() and the stores in acpi_ev_attach_region() stay inside the host ACPICA operand-object heap and do not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - Without the ACPI_TYPE_LOCAL_ADDRESS_HANDLER check, acpi_ev_find_region_handler() reads address_space.space_id and follows address_space.next from a wrong-typed operand (or from AML bytes overlaying common_notify.handler), an unbounded kernel overread of adjacent heap or attacker-chosen addresses rather than a few header bytes.\nI:H - acpi_ev_initialize_region() passes the type-confused pointer from acpi_ev_find_region_handler() to acpi_ev_attach_region(), which writes region_list and handler links through it; a matching fake space_id makes acpi_ev_address_space_dispatch() later invoke address_space.handler as a function pointer, which is type-confusion control-flow hijack.\nA:H - Walking address_space.next from a non-handler object (the ASAN global-buffer-overflow in AcpiEvFindRegionHandler on issue26.aml) dereferences an invalid pointer and oopses or panics the kernel during acpi_ev_install_space_handler() or acpi_ev_initialize_region()."
    }
  }
}