Linux Kernel DisplayPort Alt Mode Pin Assignment Out-of-Bounds Access Vulnerability

A vulnerability in the Linux kernel's USB Type-C DisplayPort Alt Mode handling has been addressed. The issue arose when a DisplayPort Alt Mode port partner incorrectly indicated its pin assignment capabilities, exceeding the maximum allowable value. This discrepancy led to an out-of-bounds array access in the 'pin_assignment_show' function, causing a BRK exception. The vulnerability has been mitigated by adjusting the loop condition to prevent access to invalid pin assignment values.

Impact

Exploitation of this vulnerability could lead to a BRK exception, causing a disruption in normal operations by introducing an out-of-bounds access error.