Unprotected Debugfs Reads in Linux Kernel IIO IMU Driver

Executive Summary

This vulnerability in the Linux kernel involves the IIO IMU driver for the ADIS16480 sensor. The issue is that two debugfs files (firmware_revision and firmware_date) were created using debugfs_create_file_unsafe() but did not call debugfs_file_get() as required. This means the debugfs system cannot properly track reads, leading to a race condition where unbind operations may free the iio_dev structure while a read is still in progress.

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Detection Guidance

This vulnerability affects the Linux kernel's IIO IMU driver for ADIS16480 devices. Detection requires checking kernel logs for debugfs-related warnings or errors during unbind operations. Use commands like dmesg | grep debugfs or journalctl -k | grep debugfs to inspect kernel logs for issues related to debugfs file operations.

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Impact Analysis

This vulnerability could cause system instability or crashes if an attacker triggers a debugfs read while the device is being unbound. It may lead to memory corruption or denial of service conditions on systems using the affected ADIS16480 sensor driver.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It involves a kernel-level issue in the Linux IIO subsystem where debugfs file operations lack proper protection, potentially leading to race conditions during reads. No evidence suggests this impacts data protection, privacy, or security controls required by these regulations.

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Mitigation Strategies

Update the Linux kernel to a patched version that resolves the issue with debugfs reads in the adis16480 driver.

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