Upstream information

CVE-2025-40174 at MITRE

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 ]

SUSE information

Overall state of this security issue: Does not affect SUSE products

SUSE Bugzilla entry: 1253419 [NEW]

No SUSE Security Announcements cross referenced.

SUSE Timeline for this CVE

CVE page created: Thu Nov 13 15:33:04 2025
CVE page last modified: Thu Nov 13 15:33:04 2025