Linux Kernel Boundary Condition Vulnerability in Power Supply Interpolation Functions

A vulnerability in the Linux kernel's power supply interpolation functions has been addressed. The issue arises in the 'power_supply_temp2resist_simple' and 'power_supply_ocv2cap_simple' functions, which incorrectly handle boundary conditions. This vulnerability was introduced when the power supply core began using library interpolation. The 'ocv2cap' function improperly sets the 'high' variable, leading to an out-of-bounds read. Additionally, the 'temp2resist' function contains flawed logic that prevents accurate resistance calculations based on temperature data.

Impact

Exploitation of this vulnerability could lead to out-of-bounds read conditions, potentially causing memory access violations or information disclosure.