Vulnerability in Kernel: i2c: sprd: fix reference leak when pm_runtime_get_sync fails
Summary
GSD-2021-1000244: i2c: sprd: fix reference leak when pm_runtime_get_sync fails. Affects Kernel versions >= 8b9ec0719834fe66146d138d62ed66cef025c864, < d3406ab52097328a3bc4cbe124bfd8f6d51fb86f. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages communication between hardware and software. It provides essential functions and services for the proper functioning of the system. The i2c subsystem in the Kernel is responsible for handling communication with I2C devices, which are commonly used for connecting various peripherals. The sprd driver within the i2c subsystem is specifically designed for Spreadtrum SoCs. This driver allows communication with I2C devices on Spreadtrum-based systems. However, a vulnerability has been discovered in the sprd driver that can lead to a reference leak when the pm_runtime_get_sync function fails.
Vulnerability Detail
The vulnerability in the sprd driver occurs when the pm_runtime_get_sync function fails to acquire a reference. This can happen due to various reasons, such as an error in the device power management or resource allocation. When the function fails, it should release any acquired references to prevent resource leaks. However, in this case, the reference is not properly released, leading to a reference leak. This vulnerability can result in resource exhaustion and potential denial-of-service attacks. An attacker could exploit this vulnerability to exhaust system resources, causing instability or crashes.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Kernel to the fixed version to mitigate the risk of exploitation.
Conclusion
The vulnerability in the sprd driver of the Kernel can lead to a reference leak when the pm_runtime_get_sync function fails. This can result in resource exhaustion and potential denial-of-service attacks. To mitigate this vulnerability, it is crucial to update the Kernel to version v5.12.4 or later. There is no known workaround for this issue. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to resource exhaustion and potential denial-of-service attacks. An attacker could exploit this vulnerability to exhaust system resources, causing instability or crashes.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to update the Kernel to the fixed version to prevent potential exploitation.
No, there is no known workaround for this vulnerability. Updating the Kernel to the fixed version is the recommended solution.
You can find more information about this vulnerability in the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/.
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