CVE-2025-40018— ipvs: Defer ip_vs_ftp unregister during netns cleanup
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 61b1ab4583e275af216c8454b9256de680499b19< 8a6ecab3847c213ce2855b0378e63ce839085de3 | affected |
61b1ab4583e275af216c8454b9256de680499b19< 421b1ae1574dfdda68b835c15ac4921ec0030182 | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< 1d79471414d7b9424d699afff2aa79fff322f52d | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< 53717f8a4347b78eac6488072ad8e5adbaff38d9 | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< 8cbe2a21d85727b66d7c591fd5d83df0d8c4f757 | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< dc1a481359a72ee7e548f1f5da671282a7c13b8f | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< a343811ef138a265407167294275201621e9ebb2 | affected | ||
61b1ab4583e275af216c8454b9256de680499b19< 134121bfd99a06d44ef5ba15a9beb075297c0821 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2025-40018
Vulnerability Information
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Vulnerability Title
ipvs: Defer ip_vs_ftp unregister during netns cleanup
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: Defer ip_vs_ftp unregister during netns cleanup On the netns cleanup path, __ip_vs_ftp_exit() may unregister ip_vs_ftp before connections with valid cp->app pointers are flushed, leading to a use-after-free. Fix this by introducing a global `exiting_module` flag, set to true in ip_vs_ftp_exit() before unregistering the pernet subsystem. In __ip_vs_ftp_exit(), skip ip_vs_ftp unregister if called during netns cleanup (when exiting_module is false) and defer it to __ip_vs_cleanup_batch(), which unregisters all apps after all connections are flushed. If called during module exit, unregister ip_vs_ftp immediately.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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ip_vs_ftp模块过早注销，可能导致释放后重用。
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
II. Public POCs for CVE-2025-40018
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2025-40018 (2)
Same Patch Batch · Linux · 2025-10-24 · 8 CVEs total
| CVE-2023-53733 | net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode | |
| CVE-2025-40019 | crypto: essiv - Check ssize for decryption and in-place encryption | |
| CVE-2025-40020 | can: peak_usb: fix shift-out-of-bounds issue | |
| CVE-2025-40021 | tracing: dynevent: Add a missing lockdown check on dynevent | |
| CVE-2025-40022 | crypto: af_alg - Fix incorrect boolean values in af_alg_ctx | |
| CVE-2025-40023 | drm/xe/vf: Don't expose sysfs attributes not applicable for VFs | |
| CVE-2025-40024 | vhost: Take a reference on the task in struct vhost_task. |
IV. Related Vulnerabilities
V. Comments for CVE-2025-40018
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