CVE-2021-47653

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue was found in the Linux kernel's media subsystem, specifically in the davinci vpif driver. The driver allocates and registers two platform device structures during probe but fails to deregister them on driver unbind. This results in a use-after-free when the device structures are freed by the driver core. The issue is caused by the lack of proper deregistration calls in the remove() callback and the failure to handle registration errors during probe.

Recommendations To resolve this issue, add the missing deregistration calls to the remove() callback and ensure that the platform device structures are freed using a proper release callback to avoid resource leaks. Additionally, fail the probe on registration errors to prevent the driver from being used in an inconsistent state.