Linux Kernel Vulnerability in f2fs Segment Handling by Linux Foundation

CVE-2025-38333

What is CVE-2025-38333?

A vulnerability exists in the Linux kernel's f2fs (Flash-Friendly File System) that can arise during segment allocation. When get_new_segment() detects inconsistent status between the free segment map and free sector map, it is crucial to log this error into the super block and abort the segment allocation process. Failure to manage this inconsistency correctly can lead to undefined behavior or system instability, affecting data integrity and performance. The kernel has been updated to ensure proper handling of such cases, improving overall system reliability.

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