Linux Kernel jbd2 Vulnerability in ext4 File System

CVE-2023-53526

What is CVE-2023-53526?

A vulnerability exists in the jbd2 module of the Linux Kernel, specifically affecting the ext4 file system, where improper handling of the 'jh->b_transaction' could lead to checkpoint corruption during certain processes. This issue occurs when a buffer's transaction is removed from the checkpoint list without verifying its state, potentially causing data loss during unexpected power interruptions. This vulnerability emphasizes the need for a robust check to ensure 'jh->b_transaction' is validated prior to its removal from the checkpoint list, thus safeguarding file integrity during transaction commits.

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