{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40348 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40348 is a vulnerability in Linux, published on 16 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-2025-40348 and fix it if it is affected.\n\nWhat it is: CVE-2025-40348 is a vulnerability in Linux, published on 16 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-2025-40348 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-2025-40348/ (Markdown: https://insights.sbomify.com/CVE-2025-40348/index.md)","id":"CVE-2025-40348","markdown":"https://insights.sbomify.com/CVE-2025-40348/index.md","name":"CVE-2025-40348","record":{"aliases":["BELL-CVE-2025-40348","GHSA-468j-fmh4-69r9","UBUNTU-CVE-2025-40348"],"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":"none","summary":"A race condition in the Linux kernel slab allocator can lead to a NULL pointer dereference and system crash.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nslab: Avoid race on slab-\u003eobj_exts in alloc_slab_obj_exts\n\nIf two competing threads enter alloc_slab_obj_exts() and one of them\nfails to allocate the object extension vector, it might override the\nvalid slab-\u003eobj_exts allocated by the other thread with\nOBJEXTS_ALLOC_FAIL. This will cause the thread that lost this race and\nexpects a valid pointer to dereference a NULL pointer later on.\n\nUpdate slab-\u003eobj_exts atomically using cmpxchg() to avoid\nslab-\u003eobj_exts overrides by racing threads.\n\nThanks for Vlastimil and Suren's help with debugging.","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":"slab: Avoid race on slab-\u003eobj_exts in alloc_slab_obj_exts","id":"CVE-2025-40348","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"hfs: validate record offset in hfsplus_bmap_alloc","id":"CVE-2025-40349"},"packages":[],"prev":{"headline":"net: enetc: fix the deadlock of enetc_mdio_lock","id":"CVE-2025-40347"},"products":["Linux"],"published":"2025-12-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A race condition in the Linux kernel slab allocator can lead to a NULL pointer dereference and system crash.","url":"https://insights.sbomify.com/CVE-2025-40348/"}