Information about this vulnerability and the patches needed are included in the link I provided. RHEL 9.3 has a newer kernel version (5.14.0-362.8.1) that is already patched for CVE-2023-1998. This vulnerability was fixed in kernel version 5.14.0-284.25.1. Therefore, any kernel version higher than that should be safe from this vulnerability. You can check your kernel version by running the command
uname -r in the terminal.
Microsoft Azure also has deployed mitigation across all of our servers. You can read more about this here: Guidance for mitigating silicon based micro-architectural and speculative execution side-channel vulnerabilities.
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