FKIE_CVE-2026-97446

Vulnerability from fkie_nvd - Published: 2026-09-24 17:17 - Updated: 2026-09-25 13:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package() acpi_ns_custom_package() unconditionally dereferences the first element of the package to read the _BIX version number, without checking for NULL: if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER) When firmware returns a _BIX package whose first element is an unresolvable reference, ACPICA evaluates that entry to NULL. acpi_ns_remove_null_elements() does not strip NULL entries for ACPI_PTYPE_CUSTOM packages (fixed-position format would break if elements were shifted), so acpi_ns_custom_package() sees the NULL and causes a crash. Add a NULL check for the first element (version field) before dereferencing it. The caller then receives AE_AML_OPERAND_TYPE instead of crashing.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsprepkg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3762c6c8ae5073892d7cec736cc54270c7c9ce90",
              "status": "affected",
              "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
              "versionType": "git"
            },
            {
              "lessThan": "3cbf096a478f4fa03953f0685ad28c9c82ce67cb",
              "status": "affected",
              "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
              "versionType": "git"
            },
            {
              "lessThan": "f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc",
              "status": "affected",
              "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsprepkg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()\n\nacpi_ns_custom_package() unconditionally dereferences the first element\nof the package to read the _BIX version number, without checking for\nNULL:\n\n    if ((*Elements)-\u003eCommon.Type != ACPI_TYPE_INTEGER)\n\nWhen firmware returns a _BIX package whose first element is an\nunresolvable reference, ACPICA evaluates that entry to NULL.\nacpi_ns_remove_null_elements() does not strip NULL entries for\nACPI_PTYPE_CUSTOM packages (fixed-position format would break if\nelements were shifted), so acpi_ns_custom_package() sees the NULL\nand causes a crash.\n\nAdd a NULL check for the first element (version field) before\ndereferencing it. The caller then receives AE_AML_OPERAND_TYPE\ninstead of crashing."
    }
  ],
  "id": "CVE-2026-97446",
  "lastModified": "2026-09-25T13:17:28.393",
  "metrics": {},
  "published": "2026-09-24T17:17:22.880",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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