The Linux kernel is introducing a workaround for AMD TLBI Erratum #1718, addressing a defect in certain Zen CPUs. This erratum could lead to stale translation entries when the Translation Lookaside Buffer Invalidate instruction is used. While AMD previously provided a fix for this issue via CPU microcode updates, the new kernel workaround is for systems where the updated microcode has not been applied. This kernel-level patch is being integrated with the Linux 7.3-rc7 kernel, released today, October 12, 2026, and is also slated for back-porting to earlier stable kernel versions to ensure broader protection for affected hardware.