CVE-2026-97446ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7952d40240855932de01bbe81c02bf1416ec91d8 before fad537538cdfcdc51e41db61bbf9ebe5ed9427eb; from 7952d40240855932de01bbe81c02bf1416ec91d8 before 9936507ac0f2379787a2a805b11ab1cf0f241372; from 7952d40240855932de01bbe81c02bf1416ec91d8 before 644888605f55395e6012ed43e3ed643ef7ab5013; 7952d40240855932de01bbe81c02bf1416ec91d8 builds before 08c5dee5da1d8d99b5a4e94db5a3d873c491771e; 7952d40240855932de01bbe81c02bf1416ec91d8 builds before 3762c6c8ae5073892d7cec736cc54270c7c9ce90; 7952d40240855932de01bbe81c02bf1416ec91d8 builds before 3cbf096a478f4fa03953f0685ad28c9c82ce67cb; from 7952d40240855932de01bbe81c02bf1416ec91d8 before f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc | CNA record |
References
- https://git.kernel.org/stable/c/fad537538cdfcdc51e41db61bbf9ebe5ed9427eb
- https://git.kernel.org/stable/c/9936507ac0f2379787a2a805b11ab1cf0f241372
- https://git.kernel.org/stable/c/644888605f55395e6012ed43e3ed643ef7ab5013
- https://git.kernel.org/stable/c/08c5dee5da1d8d99b5a4e94db5a3d873c491771e
- https://git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90
- https://git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb
- https://git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.