diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index b87cb12567..2cafce8cb3 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1659,7 +1659,8 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
 
     if (!sconf->mc_coding || ctx->js_switch) {
         int independent_bs = !sconf->joint_stereo;
-
+        if (get_bits_left(gb) < 7*channels*ctx->num_blocks)
+            return AVERROR_INVALIDDATA;
         for (c = 0; c < channels; c++) {
             js_blocks[0] = 0;
             js_blocks[1] = 0;