{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2022-20421 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-20421 is a high-severity use after free vulnerability in Debian Debian Linux, published on 11 Oct 2022. 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-2022-20421 and fix it if it is affected.\n\nWhat it is: CVE-2022-20421 is a high-severity use after free vulnerability in Debian Debian Linux, published on 11 Oct 2022. 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-2022-20421 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2022-20421/ (Markdown: https://insights.sbomify.com/CVE-2022-20421/index.md)","id":"CVE-2022-20421","markdown":"https://insights.sbomify.com/CVE-2022-20421/index.md","name":"CVE-2022-20421","record":{"aliases":["A-239630375","ASB-A-239630375","DEBIAN-CVE-2022-20421","GHSA-gwp4-2h57-rrxw","UBUNTU-CVE-2022-20421"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Android kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Android kernel binder driver allows local attackers to escalate privileges without user interaction.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"google_android","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"android","vendor":"google"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-239630375References: Upstream kernel","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2023-03-23","github_poc":2,"max_poc_stars":298,"metasploit":0,"nuclei":0,"refs":[{"date":"2023-03-23T10:25:59Z","kind":"github_poc","ref":"https://github.com/0xkol/badspin","stars":298,"title":"Bad Spin: Android Binder Privilege Escalation Exploit (CVE-2022-20421)"},{"date":"2025-08-29T01:38:39Z","kind":"github_poc","ref":"https://github.com/sandiyochristan/oo","stars":2,"title":"Bad Spin: Android Binder Privilege Escalation Exploit (CVE-2022-20421)"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Use after free in Android","id":"CVE-2022-20421","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","google:android"],"type":"use_after_free","year":"2022"},"n_packages":0,"n_references":3,"next":{"headline":"Race condition in Android","id":"CVE-2022-20422"},"packages":[],"prev":{"headline":"Security feature bypass in Android","id":"CVE-2022-20420"},"products":["Android"],"published":"2022-10-11","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"A use-after-free vulnerability in the Android kernel binder driver allows local attackers to escalate privileges without user interaction.","url":"https://insights.sbomify.com/CVE-2022-20421/"}