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CVE-2026-97446

ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package() PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 7952d40240855932de01bbe81c02bf1416ec91d8 before fad537538cdfcdc51e41db61bbf9ebe5ed9427eb; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before 9936507ac0f2379787a2a805b11ab1cf0f241372; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before 644888605f55395e6012ed43e3ed643ef7ab5013; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before 08c5dee5da1d8d99b5a4e94db5a3d873c491771e; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before 3762c6c8ae5073892d7cec736cc54270c7c9ce90; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before 3cbf096a478f4fa03953f0685ad28c9c82ce67cb; affected 7952d40240855932de01bbe81c02bf1416ec91d8 before f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc
Linux / Linuxaffected 4.7; unaffected 0 before 4.7; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References