{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40074 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40074 is a critical use after free vulnerability in Linux, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40074 and fix it if it is affected.\n\nWhat it is: CVE-2025-40074 is a critical use after free vulnerability in Linux, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-40074 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-2025-40074/ (Markdown: https://insights.sbomify.com/CVE-2025-40074/index.md)","id":"CVE-2025-40074","markdown":"https://insights.sbomify.com/CVE-2025-40074/index.md","name":"CVE-2025-40074","record":{"aliases":["AZL-68894","BELL-CVE-2025-40074","DEBIAN-CVE-2025-40074","GHSA-g35w-4vfx-hjpg","ROOT-OS-DEBIAN-11-CVE-2025-40074","ROOT-OS-DEBIAN-12-CVE-2025-40074","ROOT-OS-DEBIAN-13-CVE-2025-40074","ROOT-OS-UBUNTU-2204-CVE-2025-40074","ROOT-OS-UBUNTU-2404-CVE-2025-40074","UBUNTU-CVE-2025-40074"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A use-after-free vulnerability in the Linux kernel IPv4 stack 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":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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\nipv4: start using dst_dev_rcu()\n\nChange icmpv4_xrlim_allow(), ip_defrag() to prevent possible UAF.\n\nChange ipmr_prepare_xmit(), ipmr_queue_fwd_xmit(), ip_mr_output(),\nipv4_neigh_lookup() to use lockdep enabled dst_dev_rcu().","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":"ipv4: start using dst_dev_rcu()","id":"CVE-2025-40074","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"tcp_metrics: use dst_dev_net_rcu()","id":"CVE-2025-40075"},"packages":[],"prev":{"headline":"drm/msm: Do not validate SSPP when it is not ready","id":"CVE-2025-40073"},"products":["Linux"],"published":"2025-10-28","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":"2026-10-03","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel IPv4 stack allows attackers to potentially execute code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2025-40074/"}