static inline void vring_used_idx_set(VirtQueue *vq, uint16_t val)
{
    hwaddr pa;
    pa = vq->vring.used + offsetof(VRingUsed, idx);
    stw_phys(&address_space_memory, pa, val);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.