void __put_cred(struct cred *cred)
{
	kdebug("__put_cred(%p{%d,%d})", cred,
	       atomic_read(&cred->usage),
	       read_cred_subscribers(cred));

	BUG_ON(atomic_read(&cred->usage) != 0);
#ifdef CONFIG_DEBUG_CREDENTIALS
	BUG_ON(read_cred_subscribers(cred) != 0);
	cred->magic = CRED_MAGIC_DEAD;
	cred->put_addr = __builtin_return_address(0);
#endif
	BUG_ON(cred == current->cred);
	BUG_ON(cred == current->real_cred);

	call_rcu(&cred->rcu, put_cred_rcu);
}

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.