Null Pointer Dereference in regulator: rt4801
Summary
GSD-2021-1001075: regulator: rt4801: Fix NULL pointer dereference if priv->enable_gpios is NULL. Affects Kernel versions < dc68f0c9e4a001e02376fe87f4bdcacadb27e8a1. No fix is published. How to fix ↓
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Background
The regulator: rt4801 is a component of the Linux Kernel that handles power regulation for certain devices. It provides a set of APIs and functions to control and manage power supply voltages. The vulnerability in question involves a null pointer dereference when the 'priv->enable_gpios' parameter is null, leading to a potential system crash or other unexpected behavior.
Vulnerability Detail
The vulnerability arises when the 'priv->enable_gpios' parameter is not properly checked for null before being dereferenced. This can occur if the 'enable_gpios' field is not initialized or set to null in certain scenarios. An attacker could potentially exploit this vulnerability by providing malicious input or triggering specific conditions that lead to the null pointer dereference. The impact of this vulnerability could range from a system crash to potential privilege escalation or arbitrary code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Linux Kernel is not immediately feasible, a possible workaround is to ensure that the 'enable_gpios' field is properly initialized and not set to null in the affected code. This can be done by adding appropriate checks and error handling to prevent the null pointer dereference.
Conclusion
The null pointer dereference vulnerability in regulator: rt4801 can lead to system crashes, privilege escalation, or arbitrary code execution. It is crucial to update the Linux Kernel to version v5.12.13 or later to address this vulnerability. If immediate updating is not possible, implementing proper initialization and error handling for the 'enable_gpios' field can serve as a temporary workaround. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from a system crash to potential privilege escalation or arbitrary code execution.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.12.13 or later, which includes the necessary fix.
Yes, a possible workaround is to ensure that the 'enable_gpios' field is properly initialized and not set to null in the affected code.
The exploitability of this vulnerability depends on the specific system configuration and the presence of any additional security measures. However, it is possible for an attacker to exploit this vulnerability remotely under certain conditions.
There are no known instances of this vulnerability being actively exploited at the moment. However, it is always recommended to apply security patches and updates to mitigate potential risks.
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