{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40242 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40242 is a high-severity vulnerability in Linux, published on 4 Dec 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-2025-40242 and fix it if it is affected.\n\nWhat it is: CVE-2025-40242 is a high-severity vulnerability in Linux, published on 4 Dec 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-2025-40242 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-2025-40242/ (Markdown: https://insights.sbomify.com/CVE-2025-40242/index.md)","id":"CVE-2025-40242","markdown":"https://insights.sbomify.com/CVE-2025-40242/index.md","name":"CVE-2025-40242","record":{"aliases":["BELL-CVE-2025-40242","DEBIAN-CVE-2025-40242","GHSA-4g8j-hwjq-h8fr","ROOT-OS-DEBIAN-11-CVE-2025-40242","ROOT-OS-DEBIAN-12-CVE-2025-40242","ROOT-OS-UBUNTU-2204-CVE-2025-40242","ROOT-OS-UBUNTU-2404-CVE-2025-40242","UBUNTU-CVE-2025-40242"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel GFS2 filesystem allows dereferencing freed memory, potentially causing a system crash.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/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\ngfs2: Fix unlikely race in gdlm_put_lock\n\nIn gdlm_put_lock(), there is a small window of time in which the\nDFL_UNMOUNT flag has been set but the lockspace hasn't been released,\nyet.  In that window, dlm may still call gdlm_ast() and gdlm_bast().\nTo prevent it from dereferencing freed glock objects, only free the\nglock if the lockspace has actually been released.","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":"gfs2: Fix unlikely race in gdlm_put_lock","id":"CVE-2025-40242","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"hfs: fix KMSAN uninit-value issue in hfs_find_set_zero_bits()","id":"CVE-2025-40243"},"packages":[],"prev":{"headline":"erofs: fix crafted invalid cases for encoded extents","id":"CVE-2025-40241"},"products":["Linux"],"published":"2025-12-04","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 race condition in the Linux kernel GFS2 filesystem allows dereferencing freed memory, potentially causing a system crash.","url":"https://insights.sbomify.com/CVE-2025-40242/"}