{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40031 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40031 is a vulnerability in Linux, published on 28 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-2025-40031 and fix it if it is affected.\n\nWhat it is: CVE-2025-40031 is a vulnerability in Linux, published on 28 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-2025-40031 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-2025-40031/ (Markdown: https://insights.sbomify.com/CVE-2025-40031/index.md)","id":"CVE-2025-40031","markdown":"https://insights.sbomify.com/CVE-2025-40031/index.md","name":"CVE-2025-40031","record":{"aliases":["BELL-CVE-2025-40031","DEBIAN-CVE-2025-40031","GHSA-j3cc-8mgg-5gq2","ROOT-OS-DEBIAN-13-CVE-2025-40031","ROOT-OS-UBUNTU-2404-CVE-2025-40031","UBUNTU-CVE-2025-40031"],"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 local attacker can trigger a NULL pointer dereference in the Linux kernel TEE driver via a specific ioctl call, causing a system crash.","user_interaction":"not_required","vuln_class":"null_dereference"},"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\ntee: fix register_shm_helper()\n\nIn register_shm_helper(), fix incorrect error handling for a call to\niov_iter_extract_pages(). A case is missing for when\niov_iter_extract_pages() only got some pages and return a number larger\nthan 0, but not the requested amount.\n\nThis fixes a possible NULL pointer dereference following a bad input from\nioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.","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":"tee: fix register_shm_helper()","id":"CVE-2025-40031","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release","id":"CVE-2025-40032"},"packages":[],"prev":{"headline":"pinctrl: check the return value of pinmux_ops::get_function_name()","id":"CVE-2025-40030"},"products":["Linux"],"published":"2025-10-28","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 local attacker can trigger a NULL pointer dereference in the Linux kernel TEE driver via a specific ioctl call, causing a system crash.","url":"https://insights.sbomify.com/CVE-2025-40031/"}