ocfs2: Fix Data Corruption After Conversion from Inline Format

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001980: ocfs2: fix data corruption after conversion from inline format. Affects Kernel versions >= 7ce2b16bad2cbfa3fa7bbc42c4448914f639ca47, < a3a089c241cd49b33a8cdd7fcb37cc87a086912a. No fix is published. How to fix ↓

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Background

ocfs2 is a file system implemented in the Linux Kernel. It is designed for use in cluster environments and provides features such as shared disk access and distributed locking. The ocfs2 file system uses an inline format to store small files directly within the metadata structures. However, a vulnerability has been discovered that can lead to data corruption after the conversion from the inline format to the regular format.

Vulnerability Detail

The vulnerability in ocfs2 occurs during the conversion process from the inline format to the regular format. This conversion is triggered when a file grows beyond a certain size threshold. Due to a coding error, the conversion process can result in data corruption, potentially leading to file system inconsistencies and data loss. An attacker could exploit this vulnerability by creating a specially crafted file that triggers the conversion process and causes data corruption. The impact of this vulnerability can range from minor data inconsistencies to complete data loss, depending on the specific circumstances.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. Users are advised to update their Linux Kernel to the fixed version as soon as possible.

Conclusion

The ocfs2 file system in the Linux Kernel is vulnerable to data corruption after the conversion from the inline format. This vulnerability can result in file system inconsistencies and data loss. Users should update their Linux Kernel to the fixed version, v4.19.214, to mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.

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