Vulnerability in btrfs Package: fixup error handling in fixup_inode_link_counts

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-2021-1000756: btrfs: fixup error handling in fixup_inode_link_counts. Affects Kernel versions < 6d4da27bd9efdbdffbaf6aa12617a2b549a3b752. No fix is published. How to fix ↓

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Background

The btrfs package is a file system for Linux that provides advanced features such as snapshots, pooling, and checksums. It is widely used in various Linux distributions. The fixup_inode_link_counts function in the package is responsible for correcting the link counts of inodes. However, a vulnerability has been discovered in this function that could lead to potential security issues.

Vulnerability Detail

The vulnerability in the btrfs package lies in the error handling of the fixup_inode_link_counts function. The function fails to properly handle errors, which could result in unexpected behavior or system crashes. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) attack or execute arbitrary code with elevated privileges. The impact and attack plausibility of this vulnerability have not been proven yet.

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.

Conclusion

The btrfs package is vulnerable to a security issue in the fixup_inode_link_counts function. It is recommended to update the Linux Kernel to version v5.4.125 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

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