{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40018 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40018 is a high-severity use after free vulnerability in Linux, published on 24 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40018 and fix it if it is affected.\n\nWhat it is: CVE-2025-40018 is a high-severity use after free vulnerability in Linux, published on 24 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-40018 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-40018/ (Markdown: https://insights.sbomify.com/CVE-2025-40018/index.md)","id":"CVE-2025-40018","markdown":"https://insights.sbomify.com/CVE-2025-40018/index.md","name":"CVE-2025-40018","record":{"aliases":["AZL-68769","BELL-CVE-2025-40018","DEBIAN-CVE-2025-40018","GHSA-25rg-2wrr-633h","ROOT-OS-DEBIAN-11-CVE-2025-40018","ROOT-OS-DEBIAN-12-CVE-2025-40018","ROOT-OS-DEBIAN-13-CVE-2025-40018","ROOT-OS-UBUNTU-2204-CVE-2025-40018","ROOT-OS-UBUNTU-2404-CVE-2025-40018"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel IPVS","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel IPVS FTP module during network namespace cleanup allows attackers to potentially execute code or escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"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-\u003eapp 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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ipvs: Defer ip_vs_ftp unregister during netns cleanup","id":"CVE-2025-40018","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"crypto: essiv - Check ssize for decryption and in-place encryption","id":"CVE-2025-40019"},"packages":[],"prev":{"headline":"media: iris: Fix memory leak by freeing untracked persist buffer","id":"CVE-2025-40017"},"products":["Linux"],"published":"2025-10-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel IPVS FTP module during network namespace cleanup allows attackers to potentially execute code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2025-40018/"}