LTC4282 hwmon Driver Minimum Alarm Voltage Read Fix

Executive Summary

This vulnerability is an out-of-bounds access issue in the Linux kernel's hwmon subsystem, specifically in the ltc4282 driver. It occurs when reading the minimum alarm voltage for the VGPIO channel. The problem is caused by a missing return statement, which leads to incorrect memory access.

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Detection Guidance

This vulnerability is specific to the Linux kernel's hwmon subsystem for the LTC4282 hardware monitor. Detection requires checking the kernel version and the presence of the affected driver. Use commands like 'uname -r' to check the kernel version and 'lsmod | grep ltc4282' to verify if the vulnerable module is loaded.

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Impact Analysis

This vulnerability could allow an attacker to cause undefined behavior or system instability by triggering an out-of-bounds memory access. It may lead to crashes, data corruption, or potential privilege escalation if exploited.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It is a low-level hardware monitoring issue in the Linux kernel related to an out-of-bounds access in the ltc4282 driver, which could lead to incorrect voltage readings but does not involve data exposure or privacy concerns.

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Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-80696. If updating is not immediately possible, consider disabling the ltc4282 module if it is not required by unloading it with 'rmmod ltc4282'.

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