Memory Leak in nilfs_sysfs_delete_device_group in Kernel
Summary
GSD-2021-1001134: nilfs2: fix memory leak in nilfs_sysfs_delete_device_group. Affects Kernel versions >= da7141fb78db915680616e15677539fc8140cf53, < 2eb327bf4de3d1713496f231ea7ede5e4df06458. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The nilfs2 file system is a specific file system implemented within the Kernel. It is designed to provide continuous snapshotting capabilities, allowing users to revert to previous versions of files or directories. However, a vulnerability has been discovered in the nilfs_sysfs_delete_device_group function, which can lead to a memory leak issue.
Vulnerability Detail
The vulnerability, identified as GSD-2021-1001134, originates from a memory leak in the nilfs_sysfs_delete_device_group function within the nilfs2 file system. When this function is called to delete a device group, it fails to release allocated memory, resulting in a memory leak. This can potentially exhaust system resources and lead to performance degradation or even system instability. The vulnerability was introduced in version v3.17 of the Linux Kernel and has been fixed in version v5.12.14.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a temporary workaround, users can avoid triggering the nilfs_sysfs_delete_device_group function by refraining from deleting device groups in the nilfs2 file system. However, this workaround is not a permanent solution and should only be considered until the Kernel is updated to a fixed version.
Conclusion
In conclusion, the nilfs_sysfs_delete_device_group function in the nilfs2 file system within the Linux Kernel is vulnerable to a memory leak issue. This vulnerability can lead to resource exhaustion and potential system instability. It is crucial to update the Kernel to version v5.12.14 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground to check if their system is affected. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The vulnerability can result in a memory leak, leading to resource exhaustion and potential system instability or performance degradation.
You can utilize the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
Yes, it is possible to manually patch the Kernel source code to fix this vulnerability. However, this requires advanced knowledge and understanding of the Kernel's internal workings. It is recommended to follow the official update process or wait for the distribution-specific updates.
While there are alternative file systems available, it is not recommended to switch file systems as a temporary replacement for this vulnerability. It is best to apply the official fix provided by the Linux Kernel developers.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
