CVE-2026-97446 (GCVE-0-2026-97446)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:04 – Updated: 2026-09-25 12:44
VLAI
Title
ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7952d40240855932de01bbe81c02bf1416ec91d8 , < 3762c6c8ae5073892d7cec736cc54270c7c9ce90 (git)
Affected: 7952d40240855932de01bbe81c02bf1416ec91d8 , < 3cbf096a478f4fa03953f0685ad28c9c82ce67cb (git)
Affected: 7952d40240855932de01bbe81c02bf1416ec91d8 , < f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc (git)
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Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/nsprepkg.c"
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              "version": "0",
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              "versionType": "semver"
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T12:44:24.186Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90"
        },
        {
          "url": "https://git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc"
        }
      ],
      "title": "ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97446",
    "datePublished": "2026-09-24T16:04:01.612Z",
    "dateReserved": "2026-09-24T14:53:16.870Z",
    "dateUpdated": "2026-09-25T12:44:24.186Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-09-25",
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    "nvd": {
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                "product": "Linux",
                "programFiles": [
                  "drivers/acpi/acpica/nsprepkg.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "semver"
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        ],
        "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",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:45:54Z",
      "cve": "CVE-2026-97446",
      "id": "CVE-2026-97446",
      "initial_release_date": "2026-09-24T23:45:54Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-97446",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-97446.json",
      "version": "2"
    }
  }
}



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