Refcount Leak in rockchip_grf_init in Kernel
Summary
GSD-2022-1003735: soc: rockchip: Fix refcount leak in rockchip_grf_init. Affects Kernel versions >= 4c58063d4258f6beb4fd5647db6b58f49e337c8f, < 69a30b2ed620c2206cbbd1e9c112e4fc584e02bd. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that manages core system functions. It provides an interface between hardware and software, allowing applications to access system resources. The rockchip_grf_init function is part of the rockchip driver in the Kernel, specifically designed for Rockchip SoCs. This function initializes the General Register Files (GRF) for Rockchip SoCs. The GRF is responsible for controlling various hardware components and peripherals on the SoC. However, a vulnerability in the rockchip_grf_init function can lead to a refcount leak.
Vulnerability Detail
The vulnerability in rockchip_grf_init is a refcount leak, which occurs when a reference to a resource is not properly released. This can result in memory leaks and potential resource exhaustion. An attacker could potentially exploit this vulnerability to exhaust system resources, leading to a denial-of-service (DoS) condition. The vulnerability was introduced in version v4.11 of the Linux Kernel and was fixed in version v5.4.198. The fix was implemented through commit 69a30b2ed620c2206cbbd1e9c112e4fc584e02bd.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.198 or later. This can be done by pulling the latest updates from the official Linux Kernel repository using the following command:
$ git pull https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
After updating the Kernel, recompile and reinstall it on the affected system. Additionally, it is advisable to follow best practices for secure software development to minimize the risk of similar vulnerabilities in the future.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is recommended to update to the fixed version as mentioned in the 'how_to_fix' section.
Conclusion
The refcount leak vulnerability in rockchip_grf_init in the Kernel can lead to resource exhaustion and a denial-of-service condition. It is crucial to update the Kernel to the fixed version (v5.4.198 or later) to mitigate this vulnerability. Following secure software development practices and implementing additional security measures can further enhance the overall security posture. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a denial-of-service (DoS) condition by exhausting system resources.
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) and the Vulert Playground will provide real-time alerts for open-source vulnerabilities.
At the time of this report, there are no known exploits for this vulnerability. However, it is still important to apply the fix to prevent potential exploitation.
The recommended approach is to update the Kernel to the fixed version. However, if updating is not immediately feasible, it is advisable to follow general security best practices, such as implementing network segmentation, access controls, and monitoring to minimize the risk of exploitation.
The primary solution is to update the Kernel to the fixed version. However, if updating is not possible, you may consider implementing additional security measures, such as intrusion detection systems and firewalls, to detect and mitigate potential attacks targeting this vulnerability.
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