CVE-2026-23237platform/x86: classmate-laptop: Add missing NULL pointer checks
Updated under an hour ago ()
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 529aa8cb0a59367d08883f818e8c47028e819d0d before 993708fc18d0d0919db438361b4e8c1f980a8d1b; from 529aa8cb0a59367d08883f818e8c47028e819d0d before af673209d43b46257540997aba042b90ef3258c0; from 529aa8cb0a59367d08883f818e8c47028e819d0d before eb214804f03c829decf10998e9b7dd26f4c8ab9e; 529aa8cb0a59367d08883f818e8c47028e819d0d builds before 9cf4b9b8ad09d6e05307abc4e951cabdff4be652; from 529aa8cb0a59367d08883f818e8c47028e819d0d before da6e06a5fdbabea3870d18c227734b5dea5b3be6; from 529aa8cb0a59367d08883f818e8c47028e819d0d before 97528b1622b8f129574d29a571c32a3c85eafa3c; from 529aa8cb0a59367d08883f818e8c47028e819d0d before fe747d7112283f47169e9c16e751179a9b38611e | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.33.1 before 5.10.251; from 5.11 before 5.15.201; from 5.16 before 6.1.164; from 6.2 before 6.6.127; from 6.7 before 6.12.74; from 6.13 before 6.18.13; 2.6.33; 2.6.33; and 14 more ranges | NVD |
References
- https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1bpatch
- https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0patch
- https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9epatch
- https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652patch
- https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6patch
- https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3cpatch
- https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611epatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.