Memory Leak Vulnerability in nilfs2 Package
Summary
UVI-2021-1001095: nilfs2: fix memory leak in nilfs_sysfs_delete_device_group. Affects Kernel versions >= da7141fb78db915680616e15677539fc8140cf53, < 7bbb84c72484db9f95c63d523425c2189fb06b29. No fix is published. How to fix ↓
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Background
The nilfs2 package is a component of the Linux Kernel ecosystem. It provides support for the NILFS2 file system, which is a log-structured file system designed for flash memory-based storage devices. The package is responsible for managing device groups in the NILFS2 file system. Device groups are logical divisions of storage devices used for data storage and retrieval. However, a memory leak vulnerability has been discovered in the nilfs_sysfs_delete_device_group function of the nilfs2 package.
Vulnerability Detail
The memory leak vulnerability in nilfs2 arises when the nilfs_sysfs_delete_device_group function is called. This function is responsible for deleting a device group from the NILFS2 file system. However, due to a coding error, memory allocated during the deletion process is not properly freed, leading to a memory leak. An attacker could potentially exploit this vulnerability by repeatedly deleting device groups, causing the system to exhaust available memory resources. This could result in system instability, performance degradation, or even a denial-of-service condition. The vulnerability was introduced in version v3.17 of the Linux Kernel and has been fixed in version v4.4.274.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid the memory leak vulnerability by refraining from deleting device groups in the NILFS2 file system until the Linux Kernel is updated to a fixed version.
Conclusion
In conclusion, the nilfs2 package in the Linux Kernel is vulnerable to a memory leak issue in the nilfs_sysfs_delete_device_group function. This vulnerability can be mitigated by updating the Linux Kernel to version v4.4.274 or later. Users can also temporarily avoid the vulnerability by refraining from deleting device groups in the NILFS2 file system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The nilfs2 package is a component of the Linux Kernel ecosystem that provides support for the NILFS2 file system, designed for flash memory-based storage devices.
A device group is a logical division of storage devices used for data storage and retrieval in the NILFS2 file system.
The memory leak vulnerability in nilfs2 can lead to system instability, performance degradation, or a denial-of-service condition due to the exhaustion of available memory resources.
To fix the vulnerability, it is recommended to update the Linux Kernel to version v4.4.274 or later, which includes the necessary fix for the memory leak issue.
Yes, users can avoid the memory leak vulnerability by refraining from deleting device groups in the NILFS2 file system until the Linux Kernel is updated to a fixed version.
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