{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-97445",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-97445"
  ],
  "published": "2026-09-24T16:08:25Z",
  "summary": "ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()\n\nEnhance buffer validation in acpi_ut_walk_aml_resources() to prevent\nbuffer overflows.",
  "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-2026-97445"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/816badec122fe01d05265f2d306212739f5d3fdb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cd60a407a3a6d75347a04f9271b7b561d06d21c8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/37c794f87a72471f7ef71633ac0550ad14ac0885"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/50a11e2f3dc8a7189e7ebbd3eeafa51f16128a56"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f65e2ef7ccca11dc874f48aff996a6a26528f8e7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d0fb1973f705c8b8bd7e118e4a9a65d05d800fba"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b2e21fe8c3361c3d0d57ee56d359bea9b51fda3d"
    }
  ],
  "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 - Malformed AML resource bytes arrive in a Buffer from DSDT/SSDT, not a network message. acpi_ut_walk_aml_resources() is reached from acpi_ex_concat_template() during acpi_bus_init\u2192acpi_load_tables\u2192acpi_ns_load_table (ConcatenateResTemplate) and from acpi_rs_create_resource_list() via acpi_dev_get_resources() on _CRS; both are local firmware paths.\nAC:L - A Buffer whose remaining length is below sizeof(aml_resource_end_tag), a large descriptor shorter than the serial_bus.type field, or a 16-bit Resource Length larger than end_aml-aml makes acpi_ut_validate_resource() and acpi_rs_convert_aml_to_resources() over-read on every walk; the table author sets those bytes and no race is required.\nPR:N - acpi_bus_init() calls acpi_load_tables() which executes module-level ConcatenateResTemplate, and acpi_dev_get_resources() walks _CRS during scan, neither with a uid or capability check; a compromised DSDT/SSDT is enough with no local account.\nUI:N - acpi_ns_execute_table() evaluates module-level AML during acpi_load_tables(), and acpi_scan_claim_resources()/acpi_dev_get_resources() walk _CRS while claiming device resources; both run on ordinary power-on with no mount, file-open, or other victim action.\nS:U - The over-read is of kernel heap adjacent to the ACPI Buffer object's payload (acpi_ut_create_buffer_object) inside the host ACPICA interpreter; it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - Without the length>(end_aml-aml) check, a large vendor/GPIO/serial descriptor whose 16-bit Resource Length exceeds the remaining Buffer lets acpi_rs_convert_aml_to_resource() ACPI_RSC_MOVE*/COUNT16 copy up to that claimed length from past the heap allocation, an unbounded kernel overread rather than a few header bytes.\nI:N - AddressSanitizer and the patch comments describe a READ past the AML Buffer; acpi_ut_walk_aml_resources() only validates and optionally converts into a separately sized resource list, and ConcatenateResTemplate (user_function NULL) never stores through the over-read pointer, so there is no out-of-bounds write primitive.\nA:H - acpi_ut_validate_resource() reading common_serial_bus.type or acpi_rs_move_data() copying a claimed Resource Length past the Buffer object walks off the slab allocation and can oops/panic, matching the reported KASAN heap-buffer-overflow in AcpiUtValidateResource on the ConcatenateResTemplate path."
    }
  }
}