Security vulnerabilities and automated fixes for fat32 issues
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A critical memory corruption vulnerability in a kernel FAT32 filesystem driver allowed attackers to trigger out-of-bounds writes by crafting malicious filesystem images, ultimately enabling arbitrary code execution at the highest privilege level (ring 0). The fix adds proper bounds validation for directory entry indices and cluster offsets parsed from on-disk FAT32 structures, closing a complete privilege escalation chain that could give an attacker full control of the system.