Answer in brief
CVE-2025-40018 records a High severity (CVSS 7.8) vulnerability in ipvs: Defer ip_vs_ftp unregister during netns cleanup. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=61b1ab4583e275af216c8454b9256de680499b19 <8a6ecab3847c213ce2855b0378e63ce839085de3 || >=61b1ab4583e275af216c8454b9256de680499b19 <421b1ae1574dfdda68b835c15ac4921ec0030182 || >=61b1ab4583e275af216c8454b9256de680499b19 <1d79471414d7b9424d699afff2aa79fff322f52d || >=61b1ab4583e275af216c8454b9256de680499b19 <53717f8a4347b78eac6488072ad8e5adbaff38d9 || >=61b1ab4583e275af216c8454b9256de680499b19 <8cbe2a21d85727b66d7c591fd5d83df0d8c4f757 || >=61b1ab4583e275af216c8454b9256de680499b19 <dc1a481359a72ee7e548f1f5da671282a7c13b8f || >=61b1ab4583e275af216c8454b9256de680499b19 <a343811ef138a265407167294275201621e9ebb2 || >=61b1ab4583e275af216c8454b9256de680499b19 <134121bfd99a06d44ef5ba15a9beb075297c0821 | 8a6ecab3847c213ce2855b0378e63ce839085de3, 421b1ae1574dfdda68b835c15ac4921ec0030182, 1d79471414d7b9424d699afff2aa79fff322f52d, 53717f8a4347b78eac6488072ad8e5adbaff38d9, 8cbe2a21d85727b66d7c591fd5d83df0d8c4f757, dc1a481359a72ee7e548f1f5da671282a7c13b8f, a343811ef138a265407167294275201621e9ebb2, 134121bfd99a06d44ef5ba15a9beb075297c0821 |
| Linux/Linuxgeneric | 2.6.39 | Not reported |
Published upstream
Oct 24, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.