{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-33640 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-33640 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 19 Dec 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-2021-33640 and fix it if it is affected.\n\nWhat it is: CVE-2021-33640 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 19 Dec 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-2021-33640 in the wild and no public exploit code.\n\nAffected product: Fedoraproject Fedora. 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-2021-33640/ (Markdown: https://insights.sbomify.com/CVE-2021-33640/index.md)","id":"CVE-2021-33640","markdown":"https://insights.sbomify.com/CVE-2021-33640/index.md","name":"CVE-2021-33640","record":{"aliases":["AZL-12933","AZL-34950","GHSA-pjrv-5vw3-5frj","MGASA-2022-0488","OESA-2022-2129","OESA-2023-1008"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"libtar library","requires_auth":"none","summary":"A use-after-free vulnerability in libtar allows attackers to potentially execute arbitrary code or cause a denial of service via crafted tar archives.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"openEuler","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"openeuler","vendor":"openatom"}],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t-\u003eth_buf) . As a result, the released memory is used (use-after-free).","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":"Use after free in openEuler 20.03 LTS SP1","id":"CVE-2021-33640","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora"],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Use after free in byacc","id":"CVE-2021-33641"},"packages":[],"prev":{"headline":"Privilege escalation in kernel","id":"CVE-2021-33639"},"products":["openEuler 20.03 LTS SP1","openEuler 20.03 LTS SP3","openEuler 22.03 LTS"],"published":"2022-12-19","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-17","vendors":["openEuler"]},"summary":"A use-after-free vulnerability in libtar allows attackers to potentially execute arbitrary code or cause a denial of service via crafted tar archives.","url":"https://insights.sbomify.com/CVE-2021-33640/"}