---
id: CVE-2026-93114
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  platform/surface: acpi-notify: Check ACPI companion before use

  Since every platform driver can be forced to match a device that doesn't
  match its list of device IDs be…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  platform/surface: acpi-notify: Check ACPI companion before use

  Since every platform driver can be forced to match a device that doesn't
  match its list of device IDs be…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    3855be0100efb98c26228c610db70a673611f3bd
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    9b6479da662c2ec4e931ed9f7228df46aa8c3766
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    7fea5a310e3b2db24f7aafe64897e4e659ffbb7d
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    428a82d987fcd8844e8868c85582eae75b4b5c51
  - >-
    Linux >= a9e10e58730432e5de840eb3ddd55c75f29341b3 <
    2b3a5dabe89e330413af403246b648c1890f368f
  - Linux 5.14
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:05.943'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93114'
references:
  - url: 'https://git.kernel.org/stable/c/2b3a5dabe89e330413af403246b648c1890f368f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3855be0100efb98c26228c610db70a673611f3bd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/428a82d987fcd8844e8868c85582eae75b4b5c51'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9b6479da662c2ec4e931ed9f7228df46aa8c3766'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.753Z'
epss: 0.00172
epssPercentile: 0.05828
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

platform/surface: acpi-notify: Check ACPI companion before use

Since every platform driver can be forced to match a device that doesn't
match its list of device IDs because of device_match_driver_override(),
platform drivers that rely on the existence of a device's ACPI companion
object should verify its presence.

san_probe() dereferences the result of ACPI_COMPANION() when installing
the GSBUS address space handler, so force-binding the driver to a device
without an ACPI companion leads to a NULL pointer dereference.  The
dereference was introduced when the probe function was switched from
ACPI_HANDLE() to ACPI_COMPANION().

Check the ACPI companion against NULL and return -ENODEV when it is
missing, like commit e4865a56d013 ("ACPI: driver: Check ACPI_COMPANION()
against NULL during probe") does for the core ACPI platform drivers.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.