CVE-2026-97448 (GCVE-0-2026-97448)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:04 – Updated: 2026-09-25 05:10
VLAI
Title
ACPICA: Add validation for node in acpi_ns_build_normalized_path()
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.
Severity
7.7 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < babb146ceb79e71f328788f1e2c8c7c224026e61 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 21a73528579fcbd673b668bd27a05b658123bc1b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 96b2b616870e46e2bc04efec03879683a0036e66 (git)
Affected: 0 , < 6.12.111 (semver)
Affected: 0 , < 6.18.53 (semver)
guessed Create a notification for this product.
Linux Linux Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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": "babb146ceb79e71f328788f1e2c8c7c224026e61",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "21a73528579fcbd673b668bd27a05b658123bc1b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsnames.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
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              "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": "6.12.111",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "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": "2026-09-25T05:10:41.413Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "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": "2026-09-25T05:10:41.413Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "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": [
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                    "versionType": "git"
                  },
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                    "status": "affected",
                    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                    "versionType": "git"
                  },
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                    "versionType": "git"
                  },
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                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.18.53",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/acpi/acpica/nsnames.c"
                ],
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                "vendor": "Linux",
                "versions": [
                  {
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                    "status": "unaffected",
                    "version": "6.12.111",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
                  },
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                    "status": "unaffected",
                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-97448",
        "lastModified": "2026-09-24T17:17:23.110",
        "metrics": {},
        "published": "2026-09-24T17:17:23.110",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/21a73528579fcbd673b668bd27a05b658123bc1b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/96b2b616870e46e2bc04efec03879683a0036e66"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/babb146ceb79e71f328788f1e2c8c7c224026e61"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:45:49Z",
      "cve": "CVE-2026-97448",
      "id": "CVE-2026-97448",
      "initial_release_date": "2026-09-24T23:45:49Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-97448",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-97448.json",
      "version": "2"
    }
  }
}



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