diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 9420d7f0c8..85c80ecca8 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -1843,6 +1843,9 @@ static int parse_packet_header(WMAVoiceContext *s)
     skip_bits(gb, 4);          // packet sequence number
     s->has_residual_lsps = get_bits1(gb);
     do {
+        if (get_bits_left(gb) < 6 + s->spillover_bitsize)
+            return AVERROR_INVALIDDATA;
+
         res = get_bits(gb, 6); // number of superframes per packet
                                // (minus first one if there is spillover)
         n_superframes += res;