CVE-2025-21665

Summary

CVE-2025-21665 is a vulnerability affecting the Linux kernel. This issue, specifically with the filemap component, resulted in a 64-bit offset being truncated to 32 bits on 32-bit kernels. Consequently, the function folio_seek_hole_data() entered an infinite loop during writing operations in an xfs filesystem, potentially leading to significant system disruption. This vulnerability has been rectified in recent kernel updates.

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