CVE-2026-97448 (GCVE-0-2026-97448)
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: Add validation for node in acpi_ns_build_normalized_path() Add validation for node in acpi_ns_build_normalized_path() to prevent use-after-free vulnerabilities.
References
Impacted products
Vendor Product Version
Linux Linux Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
Version: d1e7ffe50ba588ddf7de520990815c37f31776d8
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsnames.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "087eed8b347e14864f8806fa1f5976c7dc2c6792",
              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            },
            {
              "lessThan": "b06bb9b82c8f9a522dde213b1e0ddd535f22e3a2",
              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            },
            {
              "lessThan": "babb146ceb79e71f328788f1e2c8c7c224026e61",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "21a73528579fcbd673b668bd27a05b658123bc1b",
              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            },
            {
              "lessThan": "96b2b616870e46e2bc04efec03879683a0036e66",
              "status": "affected",
              "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsnames.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.3"
            },
            {
              "lessThan": "4.3",
              "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": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "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 - 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-\u003emethod.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-\u003ename 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-\u003eparent 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-\u003ename); 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-\u003ename and next_node-\u003eparent; 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 \u0026\u0026 next_node != acpi_gbl_root_node) loop."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:31.976Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/087eed8b347e14864f8806fa1f5976c7dc2c6792"
        },
        {
          "url": "https://git.kernel.org/stable/c/b06bb9b82c8f9a522dde213b1e0ddd535f22e3a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/90ebe7f8bb6ca1c6eadb16bed141ab8bb3dbab70"
        },
        {
          "url": "https://git.kernel.org/stable/c/26dd27000e9540fcb594f15010b0696b03b0d240"
        },
        {
          "url": "https://git.kernel.org/stable/c/babb146ceb79e71f328788f1e2c8c7c224026e61"
        },
        {
          "url": "https://git.kernel.org/stable/c/21a73528579fcbd673b668bd27a05b658123bc1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/96b2b616870e46e2bc04efec03879683a0036e66"
        }
      ],
      "title": "ACPICA: Add validation for node in acpi_ns_build_normalized_path()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97448",
    "datePublished": "2026-09-24T16:04:03.667Z",
    "dateReserved": "2026-09-24T14:53:16.870Z",
    "dateUpdated": "2026-10-03T10:58:31.976Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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