diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c
index 4328f40308..730871a12d 100644
--- a/libavcodec/vp8.c
+++ b/libavcodec/vp8.c
@@ -493,6 +493,10 @@ static int vp7_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_si
     int width  = s->avctx->width;
     int height = s->avctx->height;
 
+    if (buf_size < 4) {
+        return AVERROR_INVALIDDATA;
+    }
+
     s->profile = (buf[0] >> 1) & 7;
     if (s->profile > 1) {
         avpriv_request_sample(s->avctx, "Unknown profile %d", s->profile);