{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40084 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40084 is a high-severity vulnerability in Linux, published on 29 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-2025-40084 and fix it if it is affected.\n\nWhat it is: CVE-2025-40084 is a high-severity vulnerability in Linux, published on 29 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-2025-40084 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-2025-40084/ (Markdown: https://insights.sbomify.com/CVE-2025-40084/index.md)","id":"CVE-2025-40084","markdown":"https://insights.sbomify.com/CVE-2025-40084/index.md","name":"CVE-2025-40084","record":{"aliases":["AZL-69024","BELL-CVE-2025-40084","DEBIAN-CVE-2025-40084","GHSA-pxm9-5xjv-gw34","ROOT-OS-DEBIAN-11-CVE-2025-40084","ROOT-OS-DEBIAN-12-CVE-2025-40084","ROOT-OS-DEBIAN-13-CVE-2025-40084","ROOT-OS-UBUNTU-2204-CVE-2025-40084","ROOT-OS-UBUNTU-2404-CVE-2025-40084","UBUNTU-CVE-2025-40084"],"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 missing size check in the Linux kernel ksmbd module allows a local attacker to trigger a 4-byte out-of-bounds read, potentially causing a system crash.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: transport_ipc: validate payload size before reading handle\n\nhandle_response() dereferences the payload as a 4-byte handle without\nverifying that the declared payload size is at least 4 bytes. A malformed\nor truncated message from ksmbd.mountd can lead to a 4-byte read past the\ndeclared payload size. Validate the size before dereferencing.\n\nThis is a minimal fix to guard the initial handle read.","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":"ksmbd: transport_ipc: validate payload size before reading handle","id":"CVE-2025-40084","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card","id":"CVE-2025-40085"},"packages":[],"prev":{"headline":"net/sched: sch_qfq: Fix null-deref in agg_dequeue","id":"CVE-2025-40083"},"products":["Linux"],"published":"2025-10-29","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 missing size check in the Linux kernel ksmbd module allows a local attacker to trigger a 4-byte out-of-bounds read, potentially causing a system crash.","url":"https://insights.sbomify.com/CVE-2025-40084/"}