void teecore_init_pub_ram(void)
{
	vaddr_t s;
	vaddr_t e;

	/* get virtual addr/size of NSec shared mem allcated from teecore */
	core_mmu_get_mem_by_type(MEM_AREA_NSEC_SHM, &s, &e);

	if (s >= e || s & SMALL_PAGE_MASK || e & SMALL_PAGE_MASK)
		panic("invalid PUB RAM");

	/* extra check: we could rely on  core_mmu_get_mem_by_type() */
	if (!tee_vbuf_is_non_sec(s, e - s))
		panic("PUB RAM is not non-secure");

#ifdef CFG_PL310
	/* Allocate statically the l2cc mutex */
	tee_l2cc_store_mutex_boot_pa(virt_to_phys((void *)s));
	s += sizeof(uint32_t);			/* size of a pl310 mutex */
	s =  ROUNDUP(s, SMALL_PAGE_SIZE);	/* keep required alignment */
#endif

	default_nsec_shm_paddr = virt_to_phys((void *)s);
	default_nsec_shm_size = e - s;
}

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.