diff --git a/libavformat/vividas.c b/libavformat/vividas.c
index 3793f74c0d..bd0b6beb71 100644
--- a/libavformat/vividas.c
+++ b/libavformat/vividas.c
@@ -677,7 +677,7 @@ static int viv_read_packet(AVFormatContext *s,
             return AVERROR_INVALIDDATA;
 
         ffio_read_varlen(pb);
-        if (v_size > INT_MAX)
+        if (v_size > INT_MAX || !v_size)
             return AVERROR_INVALIDDATA;
         ret = av_get_packet(pb, pkt, v_size);
         if (ret < 0)
@@ -706,7 +706,7 @@ static int viv_read_packet(AVFormatContext *s,
     } else {
         uint64_t v_size = ffio_read_varlen(pb);
 
-        if (v_size > INT_MAX)
+        if (v_size > INT_MAX || !v_size)
             return AVERROR_INVALIDDATA;
         ret = av_get_packet(pb, pkt, v_size);
         if (ret < 0)