diff --git a/libavcodec/smc.c b/libavcodec/smc.c
index bb5f808da2..3fdedd8103 100644
--- a/libavcodec/smc.c
+++ b/libavcodec/smc.c
@@ -437,6 +437,10 @@ static int smc_decode_frame(AVCodecContext *avctx,
     SmcContext *s = avctx->priv_data;
     const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
     int ret;
+    int total_blocks = ((s->avctx->width + 3) / 4) * ((s->avctx->height + 3) / 4);
+
+    if (total_blocks / 1024 > avpkt->size)
+        return AVERROR_INVALIDDATA;
 
     bytestream2_init(&s->gb, buf, buf_size);