CVE-2025-40174 x86/mm: Fix SMP ordering in switch_mm_irqs_off()

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix SMP ordering in switchmmirqsoff Stephen noted that it is possible to not have an smpmb between the loadedmm store and the tlbgen load in switchmm, meaning the ordering against flushtlbmmrange goes out the window, and ...

PT-2025-46652

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the Linux kernel related to SMP ordering within the switch mm irqs off function. Specifically, a missing memory barrier smp mb between storing the loaded memory manageme...