Memory Leak in jffs2_do_fill_super in Kernel
Summary
GSD-2022-1002634: jffs2: fix memory leak in jffs2_do_fill_super. Affects Kernel versions >= e631ddba588783edd521c5a89f7b2902772fb691, < 69295267c481545f636b69ff341b8db75aa136b9. 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, including hardware communication, process management, and memory allocation. It provides an interface between the hardware and software layers, allowing applications to interact with the underlying system resources. The jffs2 file system is a flash-friendly file system designed for use with NOR flash memory devices. It is commonly used in embedded systems and provides efficient storage and retrieval of data. However, a memory leak vulnerability has been identified in the jffs2_do_fill_super function, which can lead to resource exhaustion and potential system instability.
Vulnerability Detail
The memory leak vulnerability in jffs2_do_fill_super arises from a failure to release allocated memory under certain conditions. When a jffs2 file system is mounted, the jffs2_do_fill_super function is called to initialize the file system's superblock and associated data structures. However, if an error occurs during this initialization process, the function fails to properly release the allocated memory, resulting in a memory leak. This can be exploited by an attacker to exhaust system resources, leading to a denial-of-service condition or potential system instability. The vulnerability was introduced in version v2.6.15 of the Linux Kernel and has been fixed in version v5.18.4.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can avoid mounting jffs2 file systems until the Kernel is updated to a fixed version. This can help mitigate the risk of resource exhaustion and potential system instability. However, it is recommended to apply the official fix as soon as possible to ensure the long-term security and stability of the system.
Conclusion
In conclusion, the memory leak vulnerability in jffs2_do_fill_super can lead to resource exhaustion and potential system instability. It is crucial to update the Linux Kernel to version v5.18.4 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground (https://vulert.com/scanner) to check if their system is affected and obtain real-time alerts for open-source vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The memory leak vulnerability in jffs2_do_fill_super can lead to resource exhaustion and potential system instability. It can be exploited by an attacker to cause a denial-of-service condition or disrupt normal system operation.
You can use the Vulert Playground (https://vulert.com/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 memory leak in jffs2_do_fill_super.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the fix as soon as possible to prevent potential exploitation.
While a temporary workaround is available by avoiding the mounting of jffs2 file systems, it is strongly recommended to apply the official fix by updating the Kernel. Workarounds may only provide temporary relief and may not address all potential attack vectors.
For more information about this vulnerability, including technical details and the official fix, you can refer to the vulnerability database entry at: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002634.json
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