CVE-2025-40174
- Source
- https://cve.org/CVERecord?id=CVE-2025-40174
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40174.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-40174
- Downstream
- Published
- 2025-11-12T10:53:49Z
- Modified
- 2026-08-12T03:51:09Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- x86/mm: Fix SMP ordering in switch_mm_irqs_off()
- Details
-
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 ]
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40174.json" }- References
-
- https://git.kernel.org/stable/c/0fe5e3f5fb75c5d88dad24dece3ee75e9d87adeb
- https://git.kernel.org/stable/c/83b0177a6c4889b3a6e865da5e21b2c9d97d0551
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40174.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-40174
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git