{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40203 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40203 is a high-severity use after free vulnerability in Linux, published on 12 Nov 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-2025-40203 and fix it if it is affected.\n\nWhat it is: CVE-2025-40203 is a high-severity use after free vulnerability in Linux, published on 12 Nov 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-2025-40203 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-2025-40203/ (Markdown: https://insights.sbomify.com/CVE-2025-40203/index.md)","id":"CVE-2025-40203","markdown":"https://insights.sbomify.com/CVE-2025-40203/index.md","name":"CVE-2025-40203","record":{"aliases":["BELL-CVE-2025-40203","DEBIAN-CVE-2025-40203","GHSA-9f95-mpr2-5ghw","ROOT-OS-DEBIAN-13-CVE-2025-40203","ROOT-OS-UBUNTU-2404-CVE-2025-40203","UBUNTU-CVE-2025-40203"],"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","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's listmount function 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\nlistmount: don't call path_put() under namespace semaphore\n\nMassage listmount() and make sure we don't call path_put() under the\nnamespace semaphore. If we put the last reference we're fscked.","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":"listmount: don't call path_put() under namespace semaphore","id":"CVE-2025-40203","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"sctp: Fix MAC comparison to be constant-time","id":"CVE-2025-40204"},"packages":[],"prev":{"headline":"ipmi: Rework user message limit handling","id":"CVE-2025-40202"},"products":["Linux"],"published":"2025-11-12","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's listmount function allows attackers to potentially execute code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2025-40203/"}