CVE-2024-53234 is a vulnerability in the Linux kernel's erofs filesystem handling. It involves improper handling of NONHEAD lclusters with delta[1] equal to zero, which occurs in crafted images or filesystems created by pre-1.0 mkfs versions. This flaw caused inadequate decompressed lengths affecting FIEMAP operations. The issue has been resolved by treating delta[1] as 1 for these legacy cases and by erroring out on illegal lclusterbits values greater than 14 for compact indexes.