Critical Memory Management Error in Linux Kernel: btrfs Package Vulnerability
Summary
CVE-2024-44963: In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to create a delayed referen... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. The btrfs (B-tree file system) is a modern file system for Linux that offers advanced features such as snapshots, dynamic inode allocation, and integrated volume management. However, it is susceptible to vulnerabilities that can compromise system stability and data integrity.
Vulnerability Detail
In the Linux kernel, specifically within the btrfs file system, a critical vulnerability has been identified where the function btrfs_free_tree_block() improperly handles errors during the freeing of tree blocks. Instead of managing errors gracefully, the function triggers a BUG_ON() assertion failure, which can lead to system crashes. This issue primarily arises when memory allocation fails (e.g., -ENOMEM) or when qgroups are enabled, allowing other errors to propagate back to the btrfs_free_tree_block() function. The failure to handle these errors appropriately can result in memory leaks and system instability.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the kernel update as soon as it becomes available.
Conclusion
The CVE-2024-44963 vulnerability in the Linux kernel's btrfs file system poses significant risks related to memory management errors. Users are strongly encouraged to update their systems to the latest kernel version to mitigate these risks. Tools like Vulert can assist in monitoring for such vulnerabilities effectively.
See every vulnerability recorded for linux →
FAQ
CVE-2024-44963 is a vulnerability in the Linux kernel's btrfs file system that improperly handles errors during memory management, potentially leading to system crashes.
You can use Vulert, a tool that monitors open-source vulnerabilities in your software. By uploading your manifest file, such as package-lock.json, you can check for vulnerabilities without needing to install any software.
The risks include system crashes, memory leaks, and potential data loss, especially if the system is under heavy load or if qgroups are enabled.
Yes, a patch has been released in the latest kernel updates. Users should ensure they are running the latest version of the Linux kernel to mitigate this vulnerability.
While there are no specific workarounds, it is advisable to monitor your system closely for any unusual behavior and plan to update your kernel as soon as possible.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
