Kernel Vulnerability in Linux Affecting File System Operations

CVE-2025-40077

What is CVE-2025-40077?

A vulnerability in the Linux kernel's f2fs file system has been identified, which could lead to potential overflow issues during left shift operations. This flaw arises from using the inappropriate type for the folio->index variable, which should be cast from pgoff_t to loff_t. Failure to implement this fix could result in erroneous behavior in file system operations, potentially allowing for exploitation if not addressed.

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