{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-97448",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-97448"
  ],
  "published": "2026-09-24T16:08:25Z",
  "summary": "ACPICA: Add validation for node in acpi_ns_build_normalized_path()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Add validation for node in acpi_ns_build_normalized_path()\n\nAdd validation for node in acpi_ns_build_normalized_path()\nto prevent use-after-free vulnerabilities.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-2026-97448"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/087eed8b347e14864f8806fa1f5976c7dc2c6792"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b06bb9b82c8f9a522dde213b1e0ddd535f22e3a2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/90ebe7f8bb6ca1c6eadb16bed141ab8bb3dbab70"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/26dd27000e9540fcb594f15010b0696b03b0d240"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/babb146ceb79e71f328788f1e2c8c7c224026e61"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21a73528579fcbd673b668bd27a05b658123bc1b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/96b2b616870e46e2bc04efec03879683a0036e66"
    }
  ],
  "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": 7.7,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The stale node that acpi_ns_build_normalized_path() walks is produced while executing attacker-supplied DSDT/SSDT AML: acpi_bus_init()\u2192acpi_load_tables()\u2192acpi_tb_load_namespace()\u2192acpi_ns_load_table()\u2192acpi_ns_execute_table()\u2192acpi_ps_parse_aml()\u2192acpi_ds_terminate_control_method()\u2192acpi_ex_stop_trace_method()\u2192acpi_ns_get_normalized_pathname(); those table bytes come from platform firmware, not a network protocol.\nAC:L - ACPICA issue #1138 reproduces a deterministic heap-use-after-free: acpi_ps_parse_aml() frees a walk_state via acpi_ds_delete_walk_state(), then acpi_ds_terminate_control_method() calls acpi_ex_stop_trace_method() which always invokes acpi_ns_get_normalized_pathname() on method_desc->method.node; crafted AML (issue33.aml) makes that pointer alias the freed walk_state with no race.\nPR:N - acpi_bus_init() calls acpi_load_tables() at boot with no capable() or credential check, so module-level AML in a compromised DSDT/SSDT reaches acpi_ex_stop_trace_method()\u2192acpi_ns_build_normalized_path() inside acpi_ns_execute_table() before any Linux account exists.\nUI:N - acpi_ns_execute_table() evaluates the DSDT/SSDT as a module-level method during acpi_load_tables() on ordinary power-on; the terminate-path UAF fires without a victim mount, sysfs open, or configfs SSDT write.\nS:U - The use-after-free is ACPI_MOVE_32_TO_32 of next_node->name inside a freed host-kernel acpi_walk_state in acpi_ns_build_normalized_path(); it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - acpi_ns_build_normalized_path() reads 4-byte namesegs and follows next_node->parent on the freed 1176-byte walk_state (ASAN: heap-use-after-free READ of size 4 at the ACPI_MOVE_32_TO_32 of next_node->name); after slab reuse that parent walk is an unbounded kernel-heap read, not a few header bytes.\nI:N - The UAF is a read of next_node->name and next_node->parent; ACPI_PATH_PUT8 only writes into the separately allocated pathname buffer from acpi_ns_get_normalized_pathname(), and acpi_ex_stop_trace_method() then ACPI_FREE()s that buffer, so there is no write through the freed walk_state.\nA:H - The reported AddressSanitizer heap-use-after-free in AcpiNsBuildNormalizedPath during AcpiLoadTables/acpi_ns_execute_table oopses the kernel at boot, and a cyclic parent pointer in the reclaimed walk_state can also hang the while (next_node && next_node != acpi_gbl_root_node) loop."
    }
  }
}