{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40174","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.177Z","datePublished":"2025-11-12T10:53:49.859Z","dateUpdated":"2026-05-11T21:44:11.692Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:44:11.692Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mm: Fix SMP ordering in switch_mm_irqs_off()\n\nStephen noted that it is possible to not have an smp_mb() between\nthe loaded_mm store and the tlb_gen load in switch_mm(), meaning the\nordering against flush_tlb_mm_range() goes out the window, and it\nbecomes possible for switch_mm() to not observe a recent tlb_gen\nupdate and fail to flush the TLBs.\n\n[ dhansen: merge conflict fixed by Ingo ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/mm/tlb.c"],"versions":[{"version":"209954cbc7d0ce1a190fc725d20ce303d74d2680","lessThan":"0fe5e3f5fb75c5d88dad24dece3ee75e9d87adeb","status":"affected","versionType":"git"},{"version":"209954cbc7d0ce1a190fc725d20ce303d74d2680","lessThan":"83b0177a6c4889b3a6e865da5e21b2c9d97d0551","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/mm/tlb.c"],"versions":[{"version":"6.14","status":"affected"},{"version":"0","lessThan":"6.14","status":"unaffected","versionType":"semver"},{"version":"6.17.5","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.17.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0fe5e3f5fb75c5d88dad24dece3ee75e9d87adeb"},{"url":"https://git.kernel.org/stable/c/83b0177a6c4889b3a6e865da5e21b2c9d97d0551"}],"title":"x86/mm: Fix SMP ordering in switch_mm_irqs_off()","x_generator":{"engine":"bippy-1.2.0"}}}}