brcmf_cfg80211_set_rekey_data(struct wiphy *wiphy, struct net_device *ndev,
			      struct cfg80211_gtk_rekey_data *gtk)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_gtk_keyinfo_le gtk_le;
	int ret;

	brcmf_dbg(TRACE, "Enter, bssidx=%d\n", ifp->bsscfgidx);

	memcpy(gtk_le.kck, gtk->kck, sizeof(gtk_le.kck));
	memcpy(gtk_le.kek, gtk->kek, sizeof(gtk_le.kek));
	memcpy(gtk_le.replay_counter, gtk->replay_ctr,
	       sizeof(gtk_le.replay_counter));

	ret = brcmf_fil_iovar_data_set(ifp, "gtk_key_info", &gtk_le,
				       sizeof(gtk_le));
	if (ret < 0)
		brcmf_err("gtk_key_info iovar failed: ret=%d\n", ret);

	return ret;
}

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.