Integer Overflow in Linux Kernel's iwlwifi Driver Affecting Specific Versions

CVE-2023-53524

What is CVE-2023-53524?

An integer overflow has been identified in the iwl_write_to_user_buf() function within the iwlwifi driver of the Linux kernel. This occurs when the function, called by iwl_dbgfs_monitor_data_read(), receives a SIZE_MAX value for the count parameter. The result is a negative value for buf_size_left, which can lead to unintended behavior in memory operations, specifically a potential heap overflow. However, it is important to note that this is classified under debugfs operations, which are typically assigned 0400 permissions, limiting its impact in practical scenarios.

References