{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40221 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40221 is a 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-2025-40221 and fix it if it is affected.\n\nWhat it is: CVE-2025-40221 is a 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-2025-40221 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-2025-40221/ (Markdown: https://insights.sbomify.com/CVE-2025-40221/index.md)","id":"CVE-2025-40221","markdown":"https://insights.sbomify.com/CVE-2025-40221/index.md","name":"CVE-2025-40221","record":{"aliases":["BELL-CVE-2025-40221","DEBIAN-CVE-2025-40221","GHSA-vg7m-wj99-9pxm","ROOT-OS-UBUNTU-2404-CVE-2025-40221","UBUNTU-CVE-2025-40221"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A local attacker can read uninitialized stack memory from the mg4b PCI media driver, potentially exposing sensitive kernel data.","user_interaction":"not_required","vuln_class":"information_disclosure"},"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\nmedia: pci: mg4b: fix uninitialized iio scan data\n\nFix potential leak of uninitialized stack data to userspace by ensuring\nthat the `scan` structure is zeroed before use.","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":"media: pci: mg4b: fix uninitialized iio scan data","id":"CVE-2025-40221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"tty: serial: sh-sci: fix RSCI FIFO overrun handling","id":"CVE-2025-40222"},"packages":[],"prev":{"headline":"fuse: fix livelock in synchronous file put from fuseblk workers","id":"CVE-2025-40220"},"products":["Linux"],"published":"2025-12-04","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 read uninitialized stack memory from the mg4b PCI media driver, potentially exposing sensitive kernel data.","url":"https://insights.sbomify.com/CVE-2025-40221/"}