Vulnerability in f2fs: remove WARN_ON in f2fs_is_valid_blkaddr
Summary
GSD-2022-1003683: f2fs: remove WARN_ON in f2fs_is_valid_blkaddr. Affects Kernel versions < 0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd. No fix is published. How to fix ↓
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Background
The f2fs package is a file system designed for flash-based storage devices in the Linux Kernel. It provides efficient data management and wear-leveling algorithms for improved performance and longevity of flash memory. The f2fs_is_valid_blkaddr function is responsible for validating block addresses within the file system.
Vulnerability Detail
The vulnerability in f2fs arises from the presence of a WARN_ON statement in the f2fs_is_valid_blkaddr function. This statement triggers a warning message when a certain condition is met, potentially leading to a denial-of-service (DoS) attack. An attacker could exploit this vulnerability by triggering the condition repeatedly, causing the system to become unresponsive or crash. The vulnerability has been fixed in Linux Kernel version v5.4.198 by commit 0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the f2fs package in the Linux Kernel is vulnerable to a denial-of-service (DoS) attack due to a WARN_ON statement in the f2fs_is_valid_blkaddr function. This vulnerability has been fixed in Linux Kernel version v5.4.198. It is recommended to update the kernel to the latest version to mitigate the risk. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
f2fs is a file system designed for flash-based storage devices in the Linux Kernel. It provides efficient data management and wear-leveling algorithms for improved performance and longevity of flash memory.
The vulnerability could potentially be exploited by an attacker to cause a denial-of-service (DoS) attack, leading to system unresponsiveness or crashes.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.198 or later.
No specific workaround has been mentioned for this vulnerability.
You can find more information about this vulnerability in the GSD-2022-1003683 entry of the GSD database maintained by the Cloud Security Alliance. The link to the source is provided in the vulnerability details.
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