diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index d10a482cad..dec6d01418 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -142,6 +142,8 @@ static av_cold int che_configure(AACContext *ac,
                                  enum ChannelPosition che_pos,
                                  int type, int id, int *channels)
 {
+    if (*channels >= MAX_CHANNELS)
+        return AVERROR_INVALIDDATA;
     if (che_pos) {
         if (!ac->che[type][id]) {
             if (!(ac->che[type][id] = av_mallocz(sizeof(ChannelElement))))