CVE-2026-23237
platform/x86: classmate-laptop: Add missing NULL pointer checks
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.
INFO
Published Date :
March 4, 2026, 3:16 p.m.
Last Modified :
March 17, 2026, 9:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Review and add NULL pointer checks in relevant driver code.
- Ensure driver data is set before accessing related objects.
- Validate sysfs attribute access timing.
- Apply the kernel patch to fix the vulnerability.
Public PoC/Exploit Available at Github
CVE-2026-23237 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-23237.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23237 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-23237
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23237 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-23237 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:2.6.33:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc8:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.33:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.164 *cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.201 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.127 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.74 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.13 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.33.1 up to (excluding) 5.10.251 Added Reference Type kernel.org: https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 04, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c Added Reference https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b Added Reference https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652 Added Reference https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0 Added Reference https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6 Added Reference https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e Added Reference https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e