RHEL instances show a RETBleed warning when running on AWS or Azure

Solution Verified - Updated -

Issue

  • How is RHEL on Azure affected by RETBleed?
  • The following warning is seen on RHEL instances:
Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible!

Environment

  • Red Hat Enterprise Linux 8.7, 9.1
  • Microsoft Azure
  • Amazon AWS
  • VMware VMs
  • Hyper-threaded instances

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