Vulnerability in ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
Summary
GSD-2021-1000813: ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed. Affects Kernel versions < 48105dc98c9ca35af418746277b087cb2bc6df7c. 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) and is widely used in Linux distributions. The ext4 file system offers improved performance, scalability, and reliability compared to its predecessors. However, a vulnerability has been discovered in the ext4_es_cache_extent function, specifically when ext4_split_extent_at fails.
Vulnerability Detail
The vulnerability in ext4 arises when the ext4_es_cache_extent function encounters an error while calling ext4_split_extent_at. This bug can lead to potential security vulnerabilities, although the exact impact and attack plausibility have not been proven. The vulnerability was introduced in an unknown version of the Linux Kernel and has been fixed in version v5.12.10 by commit 48105dc98c9ca35af418746277b087cb2bc6df7c.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The ext4 package in the Linux Kernel was found to have a vulnerability in the ext4_es_cache_extent function. This vulnerability has been fixed in version v5.12.10 of the Linux Kernel. It is recommended to update the kernel to the latest version to ensure the security and stability of your system. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
ext4 is a file system driver for the Linux Kernel, providing support for the fourth extended file system (ext4). It offers improved performance, scalability, and reliability compared to its predecessors.
The ext4_es_cache_extent function is a part of the ext4 package and is responsible for caching extents in the extent status tree (extent tree) of the ext4 file system.
ext4_split_extent_at is a function in the ext4 package that splits an extent at a given offset within the extent tree. It is used by the ext4_es_cache_extent function.
The exact impact and attack plausibility of this vulnerability have not been proven. However, it is important to keep the Linux Kernel up to date to mitigate any potential security risks.
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