diff --git a/libs/binder/Status.cpp b/libs/binder/Status.cpp
index d3520d6..3527546 100644
--- a/libs/binder/Status.cpp
+++ b/libs/binder/Status.cpp
@@ -66,13 +66,22 @@
     // Skip over fat response headers.  Not used (or propagated) in native code.
     if (mException == EX_HAS_REPLY_HEADER) {
         // Note that the header size includes the 4 byte size field.
-        const int32_t header_start = parcel.dataPosition();
+        const size_t header_start = parcel.dataPosition();
+        const size_t header_avail = parcel.dataAvail();
+
         int32_t header_size;
         status = parcel.readInt32(&header_size);
         if (status != OK) {
             setFromStatusT(status);
             return status;
         }
+
+        if (header_size < 0 || static_cast<size_t>(header_size) > header_avail) {
+          android_errorWriteLog(0x534e4554, "132650049");
+          setFromStatusT(UNKNOWN_ERROR);
+          return UNKNOWN_ERROR;
+        }
+
         parcel.setDataPosition(header_start + header_size);
         // And fat response headers are currently only used when there are no
         // exceptions, so act like there was no error.
@@ -95,6 +104,7 @@
     if (mException == EX_SERVICE_SPECIFIC) {
         status = parcel.readInt32(&mErrorCode);
     }
+
     if (status != OK) {
         setFromStatusT(status);
         return status;