ipvs: Defer ip_vs_ftp unregister during netns cleanup
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.
CVE-2025-40018
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-40018
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "8a6ecab3847c213ce2855b0378e63ce839085de3",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "421b1ae1574dfdda68b835c15ac4921ec0030182",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "1d79471414d7b9424d699afff2aa79fff322f52d",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "53717f8a4347b78eac6488072ad8e5adbaff38d9",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "8cbe2a21d85727b66d7c591fd5d83df0d8c4f757",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "dc1a481359a72ee7e548f1f5da671282a7c13b8f",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "a343811ef138a265407167294275201621e9ebb2",
"versionType": "git"
},
{
"status": "affected",
"version": "61b1ab4583e275af216c8454b9256de680499b19",
"lessThan": "134121bfd99a06d44ef5ba15a9beb075297c0821",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/ipvs/ip_vs_ftp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.39"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.39",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.301",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.246",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.195",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.156",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.112",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.53",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.3",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/ipvs/ip_vs_ftp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-40018
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30660 · Revision 1
- Added to Heist Feed
- Publisher date