The Linux kernel's i2c tegra driver had a flaw where if tegra_i2c_mutex_lock() failed to acquire the mutex, it returned without releasing the runtime PM reference acquired earlier by pm_runtime_get_sync(). This caused a leak of the runtime PM reference, preventing the device from entering runtime suspend state. The fix involves adding the missing pm_runtime_put() call before returning on mutex lock failure, ensuring proper release of the runtime PM reference.

The vulnerability causes a runtime PM reference leak that prevents the affected device from entering runtime suspend, which may lead to increased power consumption or battery drain. There is no indication of direct security compromise or code execution impact.

A fix has been implemented to add the missing pm_runtime_put() call on mutex lock failure in the tegra_i2c_mutex_lock() function. Users should apply the updated Linux kernel patches that include this fix. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisory for the current remediation guidance.