Fix NULL pointer dereferences in of_thermal_ functions in Kernel
Summary
GSD-2021-1002351: thermal: Fix NULL pointer dereferences in of_thermal_ functions. Affects Kernel versions < ef2590a5305e0b8e9342f84c2214aa478ee7f28e. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential services and manages system resources. The thermal subsystem in the Kernel is responsible for managing temperature-related aspects of the system, such as cooling mechanisms and thermal sensors. However, certain functions within the of_thermal_ module are susceptible to NULL pointer dereferences, which can lead to system instability or crashes.
Vulnerability Detail
The vulnerability arises from NULL pointer dereferences in the of_thermal_ functions of the Kernel. When these functions encounter a NULL pointer, they attempt to access or manipulate memory at that location, resulting in unexpected behavior or crashes. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) attack or execute arbitrary code with elevated privileges. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The NULL pointer dereferences in the of_thermal_ functions of the Kernel can pose a security risk, potentially leading to system instability or crashes. It is crucial to update the Kernel to version v5.15.4 or later to address this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can range from system instability to crashes, potentially leading to a denial-of-service (DoS) attack or arbitrary code execution.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
As of now, there is no known exploit for this vulnerability. However, it is crucial to update the Kernel to the latest version to mitigate any potential risks.
No specific prerequisites are mentioned for exploiting this vulnerability. However, it is always recommended to keep your system up to date with the latest security patches.
You can refer to the vulnerability details in the GSD database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002351.json for more information about this vulnerability.
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