# CVE-2026-23237: platform/x86: classmate-laptop: Add missing NULL pointer checks CVE-2026-23237 is fixed in 46 products on 1 platform, first by DEBIAN-CVE-2026-23237, released March 4, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-23237 - Priority: Routine - CVSS: 5.5 (Moderate) - EPSS: 0.0022 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 4, 2026 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23237 ## 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-default sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.55.1.150700.17.33.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-livepatch-SLE15-SP7_Update_15 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-source sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | kernel-uek ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-devel ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-devel ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-deprecated ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-deprecated ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-desktop ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-desktop ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-extra ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-extra ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-extra-netfilter ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-extra-netfilter ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-usb ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-usb ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-wireless ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-debug-modules-wireless ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-devel ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-devel ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-doc ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-doc ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-deprecated ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-deprecated ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-desktop ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-desktop ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-extra ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-extra ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-extra-netfilter ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-extra-netfilter ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-usb ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-usb ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-wireless ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-modules-wireless ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-tools ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek-tools ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-devel ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-devel ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-core ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-core ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-deprecated ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-deprecated ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-desktop ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-desktop ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-extra ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-extra ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-extra-netfilter ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-extra-netfilter ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-usb ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-usb ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-wireless ol 10 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-uek64k-modules-wireless ol 9 | 0:6.12.0-201.74.2.1.el9uek | [ELSA-2026-50232](https://patchblox.com/security/data/fix/linux/elsa-2026-50232.md) | Apr 15, 2026 | | Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 | | Linux | linux Debian 12.15 (bookworm) | 6.1.164-1 | [DEBIAN-CVE-2026-23237](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23237.md) | Mar 4, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.74-2 | [DEBIAN-CVE-2026-23237](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23237.md) | Mar 4, 2026 | | Linux | linux Debian 14 | 6.18.13-1 | [DEBIAN-CVE-2026-23237](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23237.md) | Mar 4, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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