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CVE-2023-52840 is a use-after-free vulnerability in the Linux kernel Synaptics RMI4 input driver. In rmi_unregister_function(), put_device() may invoke rmi_release_function() and free the function object before subsequent code dereferences its num_of_irqs member. The upstream correction defers put_device() until after all accesses to the object have completed.
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Linux kernel Synaptics RMI4 input-driver use-after-free flaw.
Linux kernel Synaptics RMI4 input-driver use-after-free vulnerability in rmi_unregister_function().
A low-impact use-after-free vulnerability in the Linux kernel Synaptics RMI4 input driver, occurring in rmi_unregister_function().
A use-after-free vulnerability in the Linux kernel Synaptics RMI4 input driver, within rmi_unregister_function(). Calling put_device() frees the function object before a subsequent dereference of fn->num_of_irqs; the fix moves put_device() to the end.
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