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

CVSS 7.8 · High EPSS 0.13% · P3

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux209954cbc7d0ce1a190fc725d20ce303d74d2680< 0fe5e3f5fb75c5d88dad24dece3ee75e9d87adebaffected
209954cbc7d0ce1a190fc725d20ce303d74d2680< 83b0177a6c4889b3a6e865da5e21b2c9d97d0551affected
6.14affected
< 6.14unaffected
6.17.5≤ 6.17.*unaffected
6.18≤ *unaffected
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I. Basic Information for CVE-2025-40174

Vulnerability Information
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Vulnerability Title
x86/mm: Fix SMP ordering in switch_mm_irqs_off()
Source: CVE Program / CVE List V5
Vulnerability 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 ]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于switch_mm_irqs_off函数缺少内存屏障，可能导致TLB刷新失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 209954cbc7d0ce1a190fc725d20ce303d74d2680 ~ 0fe5e3f5fb75c5d88dad24dece3ee75e9d87adeb -
LinuxLinux 6.14 -

II. Public POCs for CVE-2025-40174

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III. Intelligence Information for CVE-2025-40174

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Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total

CVE-2025-401769.8 CRITICALtls: wait for pending async decryptions if tls_strp_msg_hold fails
CVE-2025-401408.8 HIGHnet: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
CVE-2025-401868.1 HIGHtcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().
CVE-2025-401688.1 HIGHsmc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().
CVE-2025-401338.1 HIGHmptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().
CVE-2025-401588.1 HIGHipv6: use RCU in ip6_output()
CVE-2025-401358.1 HIGHipv6: use RCU in ip6_xmit()
CVE-2025-402048.1 HIGHsctp: Fix MAC comparison to be constant-time
CVE-2025-401418.0 HIGHBluetooth: ISO: Fix possible UAF on iso_conn_free
CVE-2025-401517.8 HIGHLoongArch: BPF: No support of struct argument in trampoline programs
CVE-2025-401597.8 HIGHxsk: Harden userspace-supplied xdp_desc validation
CVE-2025-401677.8 HIGHext4: detect invalid INLINE_DATA + EXTENTS flag combination
CVE-2025-401727.8 HIGHaccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
CVE-2025-401667.8 HIGHdrm/xe/guc: Check GuC running state before deregistering exec queue
CVE-2025-401657.8 HIGHmedia: nxp: imx8-isi: m2m: Fix streaming cleanup on release
CVE-2025-401497.8 HIGHtls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock().
CVE-2025-402017.8 HIGHkernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
CVE-2025-402037.8 HIGHlistmount: don't call path_put() under namespace semaphore
CVE-2025-402057.8 HIGHbtrfs: avoid potential out-of-bounds in btrfs_encode_fh()
CVE-2025-401997.8 HIGHpage_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit arches

Showing top 20 of 96 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40174

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