Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2024-42086
CVE-2024-42086:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2024-42086 affects the Linux kernel's Industrial I/O (IIO) subsystem, specifically in the BME680 chemical sensor driver. The vulnerability was discovered in the compensate() functions where variable overflows could occur due to bit shifting operations. This issue was initially identified and discussed in relation to the original implementation of the Bosch BME680 sensor support (Kernel Commit).
Technical details
The vulnerability exists in the bme680_core.c driver file where several compensate functions (temperature, pressure, and humidity) perform bit shifting operations without proper type casting. The issue specifically involves variables that could overflow during shift operations when handling calibration parameters. The fix involves adding explicit signed 32-bit type casting ((s32)) to various calibration parameters before bit shifting operations (NVD).
Impact
The vulnerability could lead to incorrect sensor readings or potential system instability due to overflow conditions in the BME680 sensor driver's compensation calculations (Ubuntu Security).
Mitigation and workarounds
The vulnerability has been fixed in multiple Linux kernel versions across different distributions. Ubuntu has released patches for versions 24.04 LTS (noble), 22.04 LTS (jammy), and 20.04 LTS (focal). The fix involves proper type casting in the compensate() functions of the BME680 driver (Ubuntu Security).
Additional resources
Source: This report was generated using AI
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