Speculative Store Bypass (CVE-2018-3639) is a security vulnerability recently unearthed by various security researchers from Google and Microsoft, and it appears to be a fourth variant of the Spectre hardware bug publicly discloised earlier this year in modern microprocessor, and later discovered to affect billions of devices. The Speculative Store Bypass vulnerability appearently lets an unprivileged attacker to bypass restrictions and gain read access to privileged memory. The vulnerability affects most if not all of Red Hat’s products, including Red Hat Enterprise Linux 5, 6, and 7 series, Red Hat Enterprise Linux 7 for ARM and Power LE, RHEL Atomic Host, Red Hat Enterprise MRG 2, Red Hat Virtualization (RHEV-H/RHV-H), Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL7, as well as Red Hat OpenStack Platform 8.0 (Liberty), 9.0 (Mitaka), 10.0 (Newton), 11.0 (Ocata), and 12.0 (Pike).