CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects drivers utilizing the PMBus interface, specifically those that select a non-VR11 VID mode, leading to incorrect voltage commands being sent to hardware components. This misconfiguration can result in devices receiving dangerously high voltage levels, potentially causing hardware damage or failure. Organizations using affected Linux systems with PMBus-compatible hardware should prioritize addressing this vulnerability to prevent potential operational disruptions and hardware risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid() pmbus_data2reg_vid() hardcoded the VR11 encoding regardless of the vrm_version configured by the driver, while pmbus_reg2data_vid() already switched on it. Any driver that selects a non-VR11 VID mode and exposes a regulator (or hwmon vout setter) sent dangerously wrong codes to PMBUS_VOUT_COMMAND -- e.g. an nvidia195mv part asked for 200 mV got the VR11 clamp to 500 mV encoded as 0xB2, which the chip interprets as 1080 mV. Mirror pmbus_reg2data_vid() so writes round-trip with reads.