CVE-2026-97445 (GCVE-0-2026-97445)
Vulnerability from cvelistv5
Published
2026-09-24 16:04
Modified
2026-10-03 10:58
Severity ?
7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources() Enhance buffer validation in acpi_ut_walk_aml_resources() to prevent buffer overflows.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/utresrc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "816badec122fe01d05265f2d306212739f5d3fdb",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
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              "status": "affected",
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              "status": "affected",
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              "versionType": "git"
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            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/utresrc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "6.1.189",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
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                  "vulnerable": true
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                {
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                  "versionEndExcluding": "6.18.53",
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "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\u0027s 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\u003e(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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:29.784Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/816badec122fe01d05265f2d306212739f5d3fdb"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd60a407a3a6d75347a04f9271b7b561d06d21c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/37c794f87a72471f7ef71633ac0550ad14ac0885"
        },
        {
          "url": "https://git.kernel.org/stable/c/50a11e2f3dc8a7189e7ebbd3eeafa51f16128a56"
        },
        {
          "url": "https://git.kernel.org/stable/c/f65e2ef7ccca11dc874f48aff996a6a26528f8e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0fb1973f705c8b8bd7e118e4a9a65d05d800fba"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2e21fe8c3361c3d0d57ee56d359bea9b51fda3d"
        }
      ],
      "title": "ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97445",
    "datePublished": "2026-09-24T16:04:00.409Z",
    "dateReserved": "2026-09-24T14:53:16.870Z",
    "dateUpdated": "2026-10-03T10:58:29.784Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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