CVE-2026-23237

MEDIUM EPSS 9.2%
Published Mar 4, 20264mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
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Published Mar 4, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: classmate-laptop: Add missing NULL pointer checks In a few places in the Classmate laptop driver, code using the accel object may run before that object's address is stored in the driver data of the input device using it. For example, cmpc_accel_sensitivity_store_v4() is the "show" method of cmpc_accel_sensitivity_attr_v4 which is added in cmpc_accel_add_v4(), before calling dev_set_drvdata() for inputdev->dev. If the sysfs attribute is accessed prematurely, the dev_get_drvdata(&inputdev->dev) call in in cmpc_accel_sensitivity_store_v4() returns NULL which leads to a NULL pointer dereference going forward. Moreover, sysfs attributes using the input device are added before initializing that device by cmpc_add_acpi_notify_device() and if one of them is accessed before running that function, a NULL pointer dereference will occur. For example, cmpc_accel_sensitivity_attr_v4 is added before calling cmpc_add_acpi_notify_device() and if it is read prematurely, the dev_get_drvdata(&acpi->dev) call in cmpc_accel_sensitivity_show_v4() returns NULL which leads to a NULL pointer dereference going forward. Fix this by adding NULL pointer checks in all of the relevant places.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 22

VendorProductVersionRange
linuxlinux_kernel*≥2.6.33.1  –  <5.10.251
linuxlinux_kernel*≥5.11  –  <5.15.201
linuxlinux_kernel*≥5.16  –  <6.1.164
linuxlinux_kernel*≥6.2  –  <6.6.127
linuxlinux_kernel*≥6.7  –  <6.12.74
linuxlinux_kernel*≥6.13  –  <6.18.13
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel2.6.33any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e
    Patch