Fedora Magazine - https://fedoramagazine.org/update-ongoing-meltdown-spectre-work/
Last week, a series of critical vulnerabilities called Spectre and Meltdown were announced. Because of the nature of these issues, the solutions are complex and requires fixing delicate code. The fixes for Meltdown are mostly underway. The Meltdown fix for x86 is KPTI. KPTI has been merged into the mainline Linux tree and many stable trees, including the ones Fedora uses. Fixes for other arches are close to being done and should be available soon. Fixing Spectre is more difficult and requires fixes across multiple areas.
Similarly to Meltdown, Spectre takes advantage of speculation done by CPUs. Part of the