ext4: Add Reserved GDT Blocks Check

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004287: ext4: add reserved GDT blocks check. Affects Kernel versions < af75c481a2e45e70f62f5942c93695e95bf7bd21. 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), which is a widely used file system in Linux distributions. The ext4 file system offers improved performance, scalability, and reliability compared to its predecessors. However, it is susceptible to certain vulnerabilities that can be exploited by attackers.

Vulnerability Detail

The vulnerability identified as GSD-2022-1004287 in the ext4 package involves the lack of a reserved GDT (Group Descriptor Table) blocks check. The GDT is a critical data structure that stores information about the layout and allocation of file system blocks. Without proper validation of reserved GDT blocks, an attacker could manipulate these blocks to cause a denial-of-service (DoS) condition, data corruption, or even execute arbitrary code within the kernel context. This vulnerability has the potential to compromise the integrity and availability of the affected system.

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. The recommended approach is to apply the fix by updating the Linux Kernel to the patched version.

Conclusion

The ext4 package is vulnerable to a lack of reserved GDT blocks check, which can be exploited to cause various security issues. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.18.6 or later. For further support on vulnerability remediation, please contact DevNack.com.

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