Use-after-free vulnerability in btrfs after failure to create a snapshot

Kernel Updated 02 Oct 2025

Summary

27/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000574: btrfs: fix use-after-free after failure to create a snapshot. Affects Kernel versions < a7b717fa15165d3d9245614680bebc48a52ac05d. 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 data integrity. It is widely used in various Linux distributions. However, a use-after-free vulnerability has been discovered in btrfs when there is a failure to create a snapshot. This vulnerability can potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition.

Vulnerability Detail

The use-after-free vulnerability in btrfs occurs when there is a failure to create a snapshot. This can lead to a situation where memory that has been freed is still accessed, potentially resulting in a crash or the execution of arbitrary code. The vulnerability has been fixed in Linux Kernel version v5.15.22 by commit a7b717fa15165d3d9245614680bebc48a52ac05d.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix mentioned above as soon as possible.

Conclusion

The use-after-free vulnerability in btrfs after a failure to create a snapshot can lead to serious security issues. It is crucial to update the Linux Kernel to version v5.15.22 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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