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

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

https://cvefeed.io/rssfeed/latest.atom / Wed, 11/12/2025 - 16:48
CVE ID : CVE-2025-40174
Published : Nov. 12, 2025, 11:15 a.m. | 3 hours, 59 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix SMP ordering in switch_mm_irqs_off() Stephen noted that it is possible to not have an smp_mb() between the loaded_mm store and the tlb_gen load in switch_mm(), meaning the ordering against flush_tlb_mm_range() goes out the window, and it becomes possible for switch_mm() to not observe a recent tlb_gen update and fail to flush the TLBs. [ dhansen: merge conflict fixed by Ingo ]
Severity: 0.0 | NA
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