CVE-2025-40174

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> x86/mm: Fix SMP ordering in switch_mm_irqs_off()<br /> <br /> Stephen noted that it is possible to not have an smp_mb() between<br /> the loaded_mm store and the tlb_gen load in switch_mm(), meaning the<br /> ordering against flush_tlb_mm_range() goes out the window, and it<br /> becomes possible for switch_mm() to not observe a recent tlb_gen<br /> update and fail to flush the TLBs.<br /> <br /> [ dhansen: merge conflict fixed by Ingo ]