CVE-2025-40174
x86/mm: Fix SMP ordering in switch_mm_irqs_off()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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 ]
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 12, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
209954cbc7d0ce1a190fc725d20ce303d74d2680 < 0fe5e3f5fb75c5d88dad24dece3ee75e9d87adeb 209954cbc7d0ce1a190fc725d20ce303d74d2680 < 83b0177a6c4889b3a6e865da5e21b2c9d97d0551
Linux / Linux
6.14