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CVE-2025-40018— ipvs: Defer ip_vs_ftp unregister during netns cleanup

EPSS 0.06% · P18
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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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 61b1ab4583e275af216c8454b9256de680499b19 ~ 8a6ecab3847c213ce2855b0378e63ce839085de3 -
LinuxLinux 2.6.39 -

II. Public POCs for CVE-2025-40018

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III. Intelligence Information for CVE-2025-40018

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Same Patch Batch · Linux · 2025-10-24 · 8 CVEs total

CVE-2023-53733net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode
CVE-2025-40019crypto: essiv - Check ssize for decryption and in-place encryption
CVE-2025-40020can: peak_usb: fix shift-out-of-bounds issue
CVE-2025-40021tracing: dynevent: Add a missing lockdown check on dynevent
CVE-2025-40022crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
CVE-2025-40023drm/xe/vf: Don't expose sysfs attributes not applicable for VFs
CVE-2025-40024vhost: Take a reference on the task in struct vhost_task.

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40018

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