Vulnerability in Kernel: f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr()

Kernel Updated 02 Oct 2025

Summary

30/12/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002788: f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr(). Affects Kernel versions < f9dfa44be0fb5e8426183a70f69a246cf5827f49. No fix is published. How to fix ↓

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Background

The Kernel is a critical component of the Linux operating system that provides essential functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between processes, and enables the execution of various tasks. The f2fs (Flash-Friendly File System) is a file system specifically designed for NAND-based flash storage devices. It aims to optimize performance and reliability for flash memory storage. However, a vulnerability has been identified in the __f2fs_setxattr() function, which is responsible for setting extended attributes (xattrs) on files in the f2fs file system.

Vulnerability Detail

The vulnerability in the __f2fs_setxattr() function of the f2fs file system allows for a potential security breach. It arises from a lack of proper sanity checks on the last xattr entry, which could lead to memory corruption or arbitrary code execution. An attacker could exploit this vulnerability by crafting a malicious xattr entry and manipulating the system to execute arbitrary code or gain unauthorized access to sensitive information. The impact and attack plausibility of this vulnerability have not been proven, but it is crucial to address it to ensure the security and integrity of the system.

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 v4.19.223 or later. The fix for this issue can be found in the commit f9dfa44be0fb5e8426183a70f69a246cf5827f49. Updating the Kernel to the latest stable version will ensure that the necessary patches are applied and the vulnerability is mitigated.

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Workaround

There is no specific workaround mentioned for this vulnerability. The recommended approach is to update the Kernel to the fixed version as mentioned above.

Conclusion

In conclusion, a vulnerability has been identified in the Kernel's f2fs file system, specifically in the __f2fs_setxattr() function. This vulnerability could potentially lead to memory corruption or arbitrary code execution. It is recommended to update the Kernel to version v4.19.223 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for Kernel →