CVE-2026-23237platform/x86: classmate-laptop: Add missing NULL pointer checks
- 5.5MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 50 days later
· 50 days later
Published
- 8 months later
· 8 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.21% · top 88% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < 993708fc18d0d0919db438361b4e8c1f980a8d1b
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < af673209d43b46257540997aba042b90ef3258c0
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < eb214804f03c829decf10998e9b7dd26f4c8ab9e
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < 9cf4b9b8ad09d6e05307abc4e951cabdff4be652
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < da6e06a5fdbabea3870d18c227734b5dea5b3be6
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < 97528b1622b8f129574d29a571c32a3c85eafa3c
- affected 529aa8cb0a59367d08883f818e8c47028e819d0d – < fe747d7112283f47169e9c16e751179a9b38611e
- affected 2.6.33
- unaffected < 2.6.33
- unaffected 5.10.251 – ≤ 5.10.*
- unaffected 5.15.201 – ≤ 5.15.*
- unaffected 6.1.164 – ≤ 6.1.*
- unaffected 6.6.127 – ≤ 6.6.*
- unaffected 6.12.74 – ≤ 6.12.*
- unaffected 6.18.13 – ≤ 6.18.*
- unaffected 6.19 – ≤ *
References
References7
- https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b (opens in a new tab)
- https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0 (opens in a new tab)
- https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e (opens in a new tab)
- https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652 (opens in a new tab)
- https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6 (opens in a new tab)
- https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c (opens in a new tab)
- https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-9409 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-23237)Record last updated .