diff --git a/media/libstagefright/timedtext/TextDescriptions.cpp b/media/libstagefright/timedtext/TextDescriptions.cpp
index 2c2d11d..3fec9ed 100644
--- a/media/libstagefright/timedtext/TextDescriptions.cpp
+++ b/media/libstagefright/timedtext/TextDescriptions.cpp
@@ -466,6 +466,10 @@
 
                 if (subChunkType == FOURCC('f', 't', 'a', 'b'))
                 {
+                    if(subChunkSize < 8) {
+                        return OK;
+                    }
+
                     tmpData += 8;
                     size_t subChunkRemaining = subChunkSize - 8;