diff --git a/libavcodec/magicyuv.c b/libavcodec/magicyuv.c
index ea1f727e5c..f13351e5b5 100644
--- a/libavcodec/magicyuv.c
+++ b/libavcodec/magicyuv.c
@@ -623,6 +623,9 @@ static int magy_decode_frame(AVCodecContext *avctx, void *data,
 
         s->slices[i][j].start = offset + header_size;
         s->slices[i][j].size  = avpkt->size - s->slices[i][j].start;
+
+        if (s->slices[i][j].size < 2)
+            return AVERROR_INVALIDDATA;
     }
 
     if (bytestream2_get_byteu(&gb) != s->planes)