CVE-2025-40018

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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)

Published

2025-10-24

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/134121bfd99a06d44ef5ba15a9beb075297c0821
• https://git.kernel.org/stable/c/1d79471414d7b9424d699afff2aa79fff322f52d
• https://git.kernel.org/stable/c/421b1ae1574dfdda68b835c15ac4921ec0030182
• https://git.kernel.org/stable/c/53717f8a4347b78eac6488072ad8e5adbaff38d9
• https://git.kernel.org/stable/c/8a6ecab3847c213ce2855b0378e63ce839085de3

Check your stackJSON