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ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-97446

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-97446

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "fad537538cdfcdc51e41db61bbf9ebe5ed9427eb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "9936507ac0f2379787a2a805b11ab1cf0f241372",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "644888605f55395e6012ed43e3ed643ef7ab5013",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "08c5dee5da1d8d99b5a4e94db5a3d873c491771e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "3762c6c8ae5073892d7cec736cc54270c7c9ce90",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "3cbf096a478f4fa03953f0685ad28c9c82ce67cb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7952d40240855932de01bbe81c02bf1416ec91d8",
        "lessThan": "f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/acpi/acpica/nsprepkg.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/acpi/acpica/nsprepkg.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97446

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#8328 · Revision 1
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Publisher date
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