Q: Given the following code slice:
```
1 int zgfx_decompress(ZGFX_CONTEXT* zgfx, const BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData,
6 	wStream sbuffer = { 0 };```
which has a CWE-787 vulnerability at line:
```
6 	wStream sbuffer = { 0 };
```
Please analyze the root cause of the vulnerability.