Hey, Using gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC). Do you know if there are any compiler options (or a patch) to mitigate the so called: Meltdown and/or Spectre vulnerabilities for this specific version of the compiler? Based on what I read over the internet, the answer is NO. Such options and a patch are available starting from GCC 8: https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00422.html Thanks, Vassilena