CVE-2026-72346 platform/x86: bitland-mifs-wmi: Fix NULL pointer dereference during suspend/resume
A NULL pointer dereference in the Linux kernel bitland-mifs-wmi driver causes a system crash during suspend/resume, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72346?
CVE-2026-72346 is a vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-72346?
How do I fix CVE-2026-72346?
Apply the vendor's patch.
Is CVE-2026-72346 being exploited?
There is no known exploitation of CVE-2026-72346 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-72346, GHSA-xmxv-96vw-vwqc, UBUNTU-CVE-2026-72346.