Answer in brief
CVE-2026-23237 records a Unknown severity vulnerability in platform/x86: classmate-laptop: Add missing NULL pointer checks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=529aa8cb0a59367d08883f818e8c47028e819d0d <993708fc18d0d0919db438361b4e8c1f980a8d1b || >=529aa8cb0a59367d08883f818e8c47028e819d0d <af673209d43b46257540997aba042b90ef3258c0 || >=529aa8cb0a59367d08883f818e8c47028e819d0d <eb214804f03c829decf10998e9b7dd26f4c8ab9e || >=529aa8cb0a59367d08883f818e8c47028e819d0d <9cf4b9b8ad09d6e05307abc4e951cabdff4be652 || >=529aa8cb0a59367d08883f818e8c47028e819d0d <da6e06a5fdbabea3870d18c227734b5dea5b3be6 || >=529aa8cb0a59367d08883f818e8c47028e819d0d <97528b1622b8f129574d29a571c32a3c85eafa3c || >=529aa8cb0a59367d08883f818e8c47028e819d0d <fe747d7112283f47169e9c16e751179a9b38611e | 993708fc18d0d0919db438361b4e8c1f980a8d1b, af673209d43b46257540997aba042b90ef3258c0, eb214804f03c829decf10998e9b7dd26f4c8ab9e, 9cf4b9b8ad09d6e05307abc4e951cabdff4be652, da6e06a5fdbabea3870d18c227734b5dea5b3be6, 97528b1622b8f129574d29a571c32a3c85eafa3c, fe747d7112283f47169e9c16e751179a9b38611e |
| Linux/Linuxgeneric | 2.6.33 | Not reported |
Published upstream
Mar 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.