Critical Vulnerability in Linux Kernel: ext4 Inline Data Handling Issue
Summary
CVE-2025-38701: In the Linux kernel, the following vulnerability has been resolved: ext4: do not BUG when INLINE_DATA_FL lacks system.data xattr A syzbot fuzzed image triggered a BUG_ON in ext4_update_inline_data() when an inode had the... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, responsible for managing hardware and system resources. It provides essential services for all other parts of the operating system. The ext4 filesystem is a widely used filesystem in Linux, known for its performance and reliability. However, it has been found to have a vulnerability related to the handling of inline data, which can lead to system instability and data corruption.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the ext4 filesystem where a BUG_ON condition is triggered in the ext4_update_inline_data() function when an inode has the INLINE_DATA_FL flag set but lacks the required system.data extended attribute. This situation can occur due to a maliciously crafted filesystem, leading to a system crash or data corruption. The vulnerability has been addressed by replacing the BUG_ON with a proper error reporting mechanism, allowing the system to handle such cases gracefully instead of crashing.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is recommended to apply the patch as soon as it becomes available.
Conclusion
The vulnerability CVE-2025-38701 in the Linux kernel's ext4 filesystem poses significant risks to system stability and data integrity. It is essential for users to update their systems to the patched versions to mitigate these risks. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
CVE-2025-38701 is a vulnerability in the Linux kernel's ext4 filesystem that can lead to system crashes when certain conditions are met.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
If exploited, this vulnerability can cause system instability, crashes, and potential data corruption.
Yes, patches are available for Debian 13 and 14. Ensure you update to the specified fixed versions to mitigate the risk.
While no specific workarounds are available, it is crucial to monitor your system for unusual behavior and apply the patch as soon as possible.
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