ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
Summary
| CVE | CVE-2026-97446 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 17:17:22 UTC |
| Updated | 2026-10-03 11:17:56 UTC |
| 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. |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.060150000 (date 2026-10-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 fad537538cdfcdc51e41db61bbf9ebe5ed9427eb git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 9936507ac0f2379787a2a805b11ab1cf0f241372 git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 644888605f55395e6012ed43e3ed643ef7ab5013 git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 08c5dee5da1d8d99b5a4e94db5a3d873c491771e git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 3762c6c8ae5073892d7cec736cc54270c7c9ce90 git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 3cbf096a478f4fa03953f0685ad28c9c82ce67cb git | Not specified |
| CNA | Linux | Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc git | Not specified |
| CNA | Linux | Linux | affected 4.7 | Not specified |
| CNA | Linux | Linux | unaffected 4.7 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.271 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/644888605f55395e6012ed43e3ed643ef7ab5013 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fad537538cdfcdc51e41db61bbf9ebe5ed9427eb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9936507ac0f2379787a2a805b11ab1cf0f241372 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/08c5dee5da1d8d99b5a4e94db5a3d873c491771e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.