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CVE-2026-97446— ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： ACPICA：修复 acpi_ns_custom_package() 中的空指针解引用问题 acpi_ns_custom_package() 函数在读取 _BIX 版本号时，无条件地解引用包（package）的第一个元素，而未检查该元素是否为 NULL： if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER) 当固件返回的 _BIX 包中第一个元素是一个无法解析的引用时，ACPICA 会将该项求值为 NULL。由于 acpi_n

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 7952d40240855932de01bbe81c02bf1416ec91d8< fad537538cdfcdc51e41db61bbf9ebe5ed9427eb affected
7952d40240855932de01bbe81c02bf1416ec91d8< 9936507ac0f2379787a2a805b11ab1cf0f241372 affected
7952d40240855932de01bbe81c02bf1416ec91d8< 644888605f55395e6012ed43e3ed643ef7ab5013 affected
7952d40240855932de01bbe81c02bf1416ec91d8< 08c5dee5da1d8d99b5a4e94db5a3d873c491771e affected
7952d40240855932de01bbe81c02bf1416ec91d8< 3762c6c8ae5073892d7cec736cc54270c7c9ce90 affected
7952d40240855932de01bbe81c02bf1416ec91d8< 3cbf096a478f4fa03953f0685ad28c9c82ce67cb affected
7952d40240855932de01bbe81c02bf1416ec91d8< f8d14b7bb0063bbbd86c0e4d73edb8cea7b362bc affected
4.7 affected
… +8 more rows
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I. Basic Information for CVE-2026-97446

Vulnerability Information
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Vulnerability Title
ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7952d40240855932de01bbe81c02bf1416ec91d8 ~ fad537538cdfcdc51e41db61bbf9ebe5ed9427eb -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-97446

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III. Intelligence Information for CVE-2026-97446

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Patches & Fixes for CVE-2026-97446 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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