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A flaw in the Linux kernels implementation of RAPL for AMD CPUS allowed a user with a local account to use the RAPL interface to infer CPU execution state. This could allow information leak of sensitive information across security boundaries.
External References: https://support.lenovo.com/lu/uk/product_security/LEN-50481 https://www.amd.com/en/corporate/product-security https://www.cybersecurity-help.cz/vdb/SB2020111118
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1897506]
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-12912
This was fixed for Fedora with the 5.9.9 stable kernel updates.