{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40018", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.152Z", "datePublished": "2025-10-24T11:44:28.955Z", "dateUpdated": "2026-05-11T21:40:53.340Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:40:53.340Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: Defer ip_vs_ftp unregister during netns cleanup\n\nOn the netns cleanup path, __ip_vs_ftp_exit() may unregister ip_vs_ftp\nbefore connections with valid cp->app pointers are flushed, leading to a\nuse-after-free.\n\nFix this by introducing a global `exiting_module` flag, set to true in\nip_vs_ftp_exit() before unregistering the pernet subsystem. In\n__ip_vs_ftp_exit(), skip ip_vs_ftp unregister if called during netns\ncleanup (when exiting_module is false) and defer it to\n__ip_vs_cleanup_batch(), which unregisters all apps after all connections\nare flushed. If called during module exit, unregister ip_vs_ftp\nimmediately."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipvs/ip_vs_ftp.c"], "versions": [{"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "8a6ecab3847c213ce2855b0378e63ce839085de3", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "421b1ae1574dfdda68b835c15ac4921ec0030182", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "1d79471414d7b9424d699afff2aa79fff322f52d", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "53717f8a4347b78eac6488072ad8e5adbaff38d9", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "8cbe2a21d85727b66d7c591fd5d83df0d8c4f757", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "dc1a481359a72ee7e548f1f5da671282a7c13b8f", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "a343811ef138a265407167294275201621e9ebb2", "status": "affected", "versionType": "git"}, {"version": "61b1ab4583e275af216c8454b9256de680499b19", "lessThan": "134121bfd99a06d44ef5ba15a9beb075297c0821", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipvs/ip_vs_ftp.c"], "versions": [{"version": "2.6.39", "status": "affected"}, {"version": "0", "lessThan": "2.6.39", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.301", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.195", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.156", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.112", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.53", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.4.301"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.10.246"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.15.195"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.1.156"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.6.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.12.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a6ecab3847c213ce2855b0378e63ce839085de3"}, {"url": "https://git.kernel.org/stable/c/421b1ae1574dfdda68b835c15ac4921ec0030182"}, {"url": "https://git.kernel.org/stable/c/1d79471414d7b9424d699afff2aa79fff322f52d"}, {"url": "https://git.kernel.org/stable/c/53717f8a4347b78eac6488072ad8e5adbaff38d9"}, {"url": "https://git.kernel.org/stable/c/8cbe2a21d85727b66d7c591fd5d83df0d8c4f757"}, {"url": "https://git.kernel.org/stable/c/dc1a481359a72ee7e548f1f5da671282a7c13b8f"}, {"url": "https://git.kernel.org/stable/c/a343811ef138a265407167294275201621e9ebb2"}, {"url": "https://git.kernel.org/stable/c/134121bfd99a06d44ef5ba15a9beb075297c0821"}], "title": "ipvs: Defer ip_vs_ftp unregister during netns cleanup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: Defer ip_vs_ftp unregister during netns cleanup\n\nOn the netns cleanup path, __ip_vs_ftp_exit() may unregister ip_vs_ftp\nbefore connections with valid cp->app pointers are flushed, leading to a\nuse-after-free.\n\nFix this by introducing a global `exiting_module` flag, set to true in\nip_vs_ftp_exit() before unregistering the pernet subsystem. In\n__ip_vs_ftp_exit(), skip ip_vs_ftp unregister if called during netns\ncleanup (when exiting_module is false) and defer it to\n__ip_vs_cleanup_batch(), which unregisters all apps after all connections\nare flushed. If called during module exit, unregister ip_vs_ftp\nimmediately."}], "id": "CVE-2025-40018", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-10-24T12:15:37.703", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/134121bfd99a06d44ef5ba15a9beb075297c0821"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d79471414d7b9424d699afff2aa79fff322f52d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/421b1ae1574dfdda68b835c15ac4921ec0030182"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53717f8a4347b78eac6488072ad8e5adbaff38d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a6ecab3847c213ce2855b0378e63ce839085de3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8cbe2a21d85727b66d7c591fd5d83df0d8c4f757"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a343811ef138a265407167294275201621e9ebb2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc1a481359a72ee7e548f1f5da671282a7c13b8f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ipvs: Defer ip_vs_ftp unregister during netns cleanup", "id": "2406196", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2406196"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40018", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40018\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40018\nhttps://lore.kernel.org/linux-cve-announce/2025102433-CVE-2025-40018-96db@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-10-27T22:12:49.765596+00:00", "updated": "2025-10-27T22:12:49.765620+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}