{"id":"CVE-2026-97446","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()\n\nacpi_ns_custom_package() unconditionally dereferences the first element\nof the package to read the _BI…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()\n\nacpi_ns_custom_package() unconditionally dereferences the first element\nof the package to read the _BI…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"Linux","product":"Linux","affected":["Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < fad537538cdfcdc51e41db61bbf9ebe5ed9427eb","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < 9936507ac0f2379787a2a805b11ab1cf0f241372","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < 644888605f55395e6012ed43e3ed643ef7ab5013","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < 08c5dee5da1d8d99b5a4e94db5a3d873c491771e","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < 3762c6c8ae5073892d7cec736cc54270c7c9ce90","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < 3cbf096a478f4fa03953f0685ad28c9c82ce67cb","Linux >= 7952d40240855932de01bbe81c02bf1416ec91d8 < f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc","Linux 4.7"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:56.300","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97446","references":[{"url":"https://git.kernel.org/stable/c/08c5dee5da1d8d99b5a4e94db5a3d873c491771e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3762c6c8ae5073892d7cec736cc54270c7c9ce90","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3cbf096a478f4fa03953f0685ad28c9c82ce67cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/644888605f55395e6012ed43e3ed643ef7ab5013","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9936507ac0f2379787a2a805b11ab1cf0f241372","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fad537538cdfcdc51e41db61bbf9ebe5ed9427eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97446.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97446"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540463"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97446"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97446"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97446.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.06621,"cvssSource":"vendor","ingestedAt":"2026-09-24T16:47:15.877Z","slug":"CVE-2026-97446","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()\n\nacpi_ns_custom_package() unconditionally dereferences the first element\nof the package to read the _BIX version number, without checking for\nNULL:\n\n    if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER)\n\nWhen firmware returns a _BIX package whose first element is an\nunresolvable reference, ACPICA evaluates that entry to NULL.\nacpi_ns_remove_null_elements() does not strip NULL entries for\nACPI_PTYPE_CUSTOM packages (fixed-position format would break if\nelements were shifted), so acpi_ns_custom_package() sees the NULL\nand causes a crash.\n\nAdd a NULL check for the first element (version field) before\ndereferencing it. The caller then receives AE_AML_OPERAND_TYPE\ninstead of crashing.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97446.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213544,"id":"CVE-2026-97446","ts":1790754771532,"field":"cvss","old":null,"new":"5.5"},{"seq":213543,"id":"CVE-2026-97446","ts":1790754771532,"field":"severity","old":"none","new":"medium"}]}