{"answers":{"affected":"1 open source package ship an affected version, including c-blosc2.","exploited":"There is no known exploitation of OSV-2021-422 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2021-422 yet. Limit exposure of the affected software until one is available.","what":"OSV-2021-422 is an use after free vulnerability in c-blosc2, published on 20 Feb 2021."},"fix_prompt":"Check this codebase for OSV-2021-422 and fix it if it is affected.\n\nWhat it is: OSV-2021-422 is an use after free vulnerability in c-blosc2, published on 20 Feb 2021. \nExploitation: There is no known exploitation of OSV-2021-422 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- c-blosc2 (OSS-Fuzz): affected all versions; no fix listed\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/OSV-2021-422/ (Markdown: https://insights.sbomify.com/OSV-2021-422/index.md)","id":"OSV-2021-422","markdown":"https://insights.sbomify.com/OSV-2021-422/index.md","name":"OSV-2021-422","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"unknown","non_default_config":false,"product_category":"Blosc2 compression library","requires_auth":"none","summary":"A heap-use-after-free vulnerability in the Blosc2 library allows attackers to potentially execute arbitrary code or cause a denial of service via crafted compressed data.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31120\n\n```\nCrash type: Heap-use-after-free READ 4\nCrash state:\nframe_get_lazychunk\nframe_decompress_chunk\nblosc2_schunk_decompress_chunk\n```","ecosystems":["OSS-Fuzz"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Heap-use-after-free in frame_get_lazychunk","id":"OSV-2021-422","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"OSS-Fuzz","product":null,"products":[],"type":"use_after_free","year":"2021"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"OSS-Fuzz","fixed":[],"introduced":[],"last_affected":[],"package":"c-blosc2","purl":"pkg:generic/c-blosc2","source":"OSV-2021-422"}],"products":null,"published":"2021-02-20","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"OSS-Fuzz","prefix":"OSV"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A heap-use-after-free vulnerability in the Blosc2 library allows attackers to potentially execute arbitrary code or cause a denial of service via crafted compressed data.","url":"https://insights.sbomify.com/OSV-2021-422/"}