int __glXDisp_DestroyPbuffer(__GLXclientState *cl, GLbyte *pc)
{
    xGLXDestroyPbufferReq *req = (xGLXDestroyPbufferReq *) pc;

    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.