ext4: Potential Denial of Service Vulnerability in Kernel

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002490: ext4: don't BUG if someone dirty pages without asking ext4 first. Affects Kernel versions < 5db60e76edf5680ff1f3a7221036fc44b308f146. 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 fourth extended file system (ext4) and is widely used in Linux distributions. The ext4 file system is known for its performance, scalability, and reliability. However, a vulnerability has been discovered in the ext4 driver that could potentially lead to a denial of service (DoS) attack.

Vulnerability Detail

The vulnerability in the ext4 driver occurs when someone dirty pages without asking ext4 first. This can trigger a bug in the system, potentially leading to a crash or system instability. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in the Linux Kernel version v4.9.311 by commit 5db60e76edf5680ff1f3a7221036fc44b308f146.

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 v4.9.311 or later. This can be done by downloading the latest stable version of the Linux Kernel from the official repository and following the installation instructions provided. After updating the Kernel, the ext4 driver will include the necessary fix to prevent the potential DoS vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability. The recommended solution is to update the Linux Kernel to the fixed version.

Conclusion

The ext4 package in the Linux Kernel has been found to have a potential denial of service vulnerability. It is crucial to update the Kernel to the fixed version to mitigate the risk of a DoS attack. For further support on vulnerability remediation, please contact DevNack.com.

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