CVE-2026-72346
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: bitland-mifs-wmi: Fix NULL pointer dereference during suspend/resume
The driver registers two distinct WMI devices: a control device (BITLAND_WMI_CONTROL) and an event device (BITLAND_WMI_EVENT). During the probe phase, the event device handling path returns early before initializing the platform profile device (data->pp_dev), leaving it NULL.
However, the PM sleep operations are registered globally for the WMI driver and are triggered for both devices. When entering suspend, the event device invokes bitland_mifs_wmi_suspend(), which passes the uninitialized data->pp_dev (NULL) into laptop_profile_get(). This leads to a NULL pointer dereference inside dev_get_drvdata(), causing a kernel Oops and halting the suspend sequence.
Fix this by adding a validity check for data->pp_dev in both the suspend and resume callbacks, safely skipping profile operations for the event device.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | dc1ec4fa86b2b8bba2b6122f2b4420217b5bae9e < 6f2cb20d8e286218d51754f06ee219d8ce754b18 | affected |
| Linux | Linux | dc1ec4fa86b2b8bba2b6122f2b4420217b5bae9e < d3666875c75eb1bc8090343fa0d6fc8fb7924356 | affected |
| Linux | Linux | 7.1 | affected |
| Linux | Linux | 0 < 7.1 | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/6f2cb20d8e286218d51754f06ee219d8ce754b18
- https://git.kernel.org/stable/c/d3666875c75eb1bc8090343fa0d6fc8fb7924356
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.