CVE-2026-97446
ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
At a glance
- Source
- NVD
- EPSS
- EPSS 0.17 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
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
European references
- ENISA EUVD · EUVD-2026-86059
- GCVE · GCVE-0-2026-97446
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 7952d40240855932de01bbe81c02bf1416ec91d8 < fad537538cdfcdc51e41db61bbf9ebe5ed9427eb ; affected 7952d40240855932de01bbe81c02bf1416ec91d8 < 9936507ac0f2379787a2a805b11ab1cf0f241372 ; affected 7952d40240855932de01bbe81c02bf1416ec91d8 < 644888605f55395e6012ed43e3ed643ef7ab5013 ; affected 7952d40240855932de01bbe81c02bf1416ec91d8 < 08c5dee5da1d8d99b5a4e94db5a3d873c491771e ; affected 7952d40240855932de01bbe81c02bf1416ec91d8 < 3762c6c8ae5073892d7cec736cc54270c7c9ce90 ; affected 7952d40240855932de01bbe81c02bf1416ec91d8 < 3cbf096a478f4fa03953f0685ad28c9c82ce67cb |
| Linux · Linux | affected 4.7 ; unaffected 0 < 4.7 ; unaffected 5.10.271 ≤ 5.10.* ; unaffected 5.15.222 ≤ 5.15.* ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |