CVE-2026-97446

Unknown

Description

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.

SeverityUnknown

CVSS—

Exploit probability7. percentile0.2%

Product

Linux

PublishedSep 24, 2026

First seenSep 24, 2026

How to fix

Update

Linux Linuxfad537538cdfcdc51e41db61bbf9ebe5ed9427eb, 9936507ac0f2379787a2a805b11ab1cf0f241372, 644888605f55395e6012ed43e3ed643ef7ab5013, 08c5dee5da1d8d99b5a4e94db5a3d873c491771e, 3762c6c8ae5073892d7cec736cc54270c7c9ce90, 3cbf096a478f4fa03953f0685ad28c9c82ce67cb, f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc or later

Affected products

Product	Affected versions	Fixed in
Linux Linux	7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < fad537538cdfcdc51e41db61bbf9ebe5ed9427eb, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < 9936507ac0f2379787a2a805b11ab1cf0f241372, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < 644888605f55395e6012ed43e3ed643ef7ab5013, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < 08c5dee5da1d8d99b5a4e94db5a3d873c491771e, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < 3762c6c8ae5073892d7cec736cc54270c7c9ce90, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < 3cbf096a478f4fa03953f0685ad28c9c82ce67cb, 7952d40240855932de01bbe81c02bf1416ec91d8 ≤ v < f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc, 4.7	fad537538cdfcdc51e41db61bbf9ebe5ed9427eb, 9936507ac0f2379787a2a805b11ab1cf0f241372, 644888605f55395e6012ed43e3ed643ef7ab5013, 08c5dee5da1d8d99b5a4e94db5a3d873c491771e, 3762c6c8ae5073892d7cec736cc54270c7c9ce90, 3cbf096a478f4fa03953f0685ad28c9c82ce67cb, f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc

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