{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40216 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40216 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-2025-40216 and fix it if it is affected.\n\nWhat it is: CVE-2025-40216 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-2025-40216 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-2025-40216/ (Markdown: https://insights.sbomify.com/CVE-2025-40216/index.md)","id":"CVE-2025-40216","markdown":"https://insights.sbomify.com/CVE-2025-40216/index.md","name":"CVE-2025-40216","record":{"aliases":["BELL-CVE-2025-40216","DEBIAN-CVE-2025-40216","GHSA-vv4p-ph8q-2hhx","UBUNTU-CVE-2025-40216"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["other"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A logic error in Linux kernel io_uring resource handling incorrectly assumes user pointer alignment, potentially causing memory access issues.","user_interaction":"not_required","vuln_class":"other"},"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\nio_uring/rsrc: don't rely on user vaddr alignment\n\nThere is no guaranteed alignment for user pointers, however the\ncalculation of an offset of the first page into a folio after coalescing\nuses some weird bit mask logic, get rid of it.","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":"io_uring/rsrc: don't rely on user vaddr alignment","id":"CVE-2025-40216","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"pidfs: validate extensible ioctls","id":"CVE-2025-40217"},"packages":[],"prev":{"headline":"xfrm: delete x-\u003etunnel as we delete x","id":"CVE-2025-40215"},"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 logic error in Linux kernel io_uring resource handling incorrectly assumes user pointer alignment, potentially causing memory access issues.","url":"https://insights.sbomify.com/CVE-2025-40216/"}