Bug 2516378 (CVE-2026-72346)

Summary: CVE-2026-72346 kernel: platform/x86: bitland-mifs-wmi: Fix NULL pointer dereference during suspend/resume
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's `bitland-mifs-wmi` driver. During suspend and resume operations, an uninitialized pointer can be passed to a function, leading to a NULL pointer dereference. This can cause a kernel crash, resulting in a denial of service (DoS) by halting the system's suspend sequence.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-15 06:09:22 UTC 
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.
Comment 1 Keith Grant 2026-08-19 13:38:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081511-CVE-2026-72346-7ac8@gregkh/T