diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index d10105d430..73522b1c2d 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -936,6 +936,8 @@ static int decode_subframe(WmallDecodeCtx *s)
             s->do_lpc = 0;
     }
 
+    if (get_bits_left(&s->gb) < 1)
+        return AVERROR_INVALIDDATA;
 
     if (get_bits1(&s->gb))
         padding_zeroes = get_bits(&s->gb, 5);