ext4: Bug in ext4_es_cache_extent as ext4_split_extent_at Failed

Kernel Updated 02 Oct 2025

Summary

25/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000753: ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed. Affects Kernel versions < 920697b004e49cb026e2e15fe91be065bf0741b7. No fix is published. How to fix ↓

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Background

The ext4 package is a file system driver for the Linux kernel. It provides support for the ext4 file system, which is commonly used in Linux distributions. The ext4 file system offers improved performance, scalability, and reliability compared to its predecessor, ext3. However, a vulnerability has been discovered in the ext4 package that can lead to a bug in the ext4_es_cache_extent function when the ext4_split_extent_at function fails.

Vulnerability Detail

The vulnerability in the ext4 package arises from a bug in the ext4_es_cache_extent function when the ext4_split_extent_at function fails. This bug can potentially have security implications, although the exact impact and attack plausibility have not been proven yet. The vulnerability was fixed in the Linux Kernel version v5.4.125 by commit 920697b004e49cb026e2e15fe91be065bf0741b7. The vulnerability was introduced in an earlier version of the Linux Kernel, but the specific commit introducing it is not mentioned.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

The ext4 package in the Linux Kernel has a vulnerability in the ext4_es_cache_extent function when the ext4_split_extent_at function fails. This vulnerability has the potential for security implications, although the exact impact is not yet proven. It is recommended to update the Linux Kernel to version v5.4.125 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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