diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 9c80b3c4e8..563d7d5a1d 100644
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -263,6 +263,8 @@ static int decode_wdlt(uint8_t *frame, int width, int height,
             segments = bytestream_get_le16(&src);
         }
         line_ptr = frame;
+        if (frame_end - frame < width)
+            return AVERROR_INVALIDDATA;
         frame += width;
         y++;
         while (segments--) {