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| This is the header stored at the beginning of unused blocks of FCRAM memory. The kernel maintains these structures to keep a list of free blocks and their sizes.
| | #REDIRECT [[MemoryBlockHeader]] |
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| By overwriting the pointers in instances of this struct (e.g. using an attack like gspwn) and then (de)allocating memory, one can achieve a controlled ARM11 kernel-mode write on system versions up to 9.2 ([[3DS_System_Flaws#Kernel11|memchunkhax]]).
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| Size : 0xC bytes?
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| {| class="wikitable" border="1"
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| |-
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| ! Offset
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| ! Type
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| ! Description
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| |-
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| | 0x0
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| | u32
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| | Size in pages
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| |-
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| | 0x4
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| | KHeapHeader*
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| | Next
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| |-
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| | 0x8
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| | KHeapHeader*
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| | Prev
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| |}
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