{"answers":{"affected":"It affects 7 products.","exploited":"There is no known exploitation of CVE-2021-36976 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-36976 is a medium-severity use after free vulnerability in Apple Ipados, published on 20 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-36976 and fix it if it is affected.\n\nWhat it is: CVE-2021-36976 is a medium-severity use after free vulnerability in Apple Ipados, published on 20 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-36976 in the wild and no public exploit code.\n\nAffected product: Apple Ipados. 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-2021-36976/ (Markdown: https://insights.sbomify.com/CVE-2021-36976/index.md)","id":"CVE-2021-36976","markdown":"https://insights.sbomify.com/CVE-2021-36976/index.md","name":"CVE-2021-36976","record":{"aliases":["ALPINE-CVE-2021-36976","AZL-6614","DEBIAN-CVE-2021-36976","GHSA-4fxq-mcvv-8fqm","JLSEC-2025-234","OESA-2021-1398","UBUNTU-CVE-2021-36976"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"libarchive library","requires_auth":"none","summary":"A use-after-free vulnerability in libarchive allows attackers to execute arbitrary code or cause a denial of service via crafted archives.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ipados","vendor":"apple"},{"product":"iphone_os","vendor":"apple"},{"product":"macos","vendor":"apple"},{"product":"watchos","vendor":"apple"},{"product":"fedora","vendor":"fedoraproject"},{"product":"libarchive","vendor":"libarchive"},{"product":"universal_forwarder","vendor":"splunk"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).","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 n/a","id":"CVE-2021-36976","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"apple:ipados","products":["apple:ipados","apple:iphone_os","apple:macos","apple:watchos","fedoraproject:fedora","libarchive:libarchive","splunk:universal_forwarder"],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":10,"next":{"headline":"Memory corruption in n/a","id":"CVE-2021-36977"},"packages":[],"prev":{"headline":"Win32k Elevation of Privilege Vulnerability","id":"CVE-2021-36975"},"products":["n/a"],"published":"2021-07-20","related":[{"cvss_score":10,"headline":"Apple iOS, iPadOS, and macOS Out-of-Bounds Write","id":"CVE-2025-43300","kev_date_added":"2025-08-21","published":"2025-08-21"},{"cvss_score":10,"headline":"Apple Multiple Products WebKit Out-of-Bounds Write","id":"CVE-2025-24201","kev_date_added":"2025-03-13","published":"2025-03-11"},{"cvss_score":10,"headline":"Apple Multiple Products Use-After-Free","id":"CVE-2025-24085","kev_date_added":"2025-01-29","published":"2025-01-27"},{"cvss_score":9.8,"headline":"Apple Multiple Products Memory Corruption","id":"CVE-2025-31200","kev_date_added":"2025-04-17","published":"2025-04-16"},{"cvss_score":9.8,"headline":"Apple Multiple Products Arbitrary Read and Write","id":"CVE-2025-31201","kev_date_added":"2025-04-17","published":"2025-04-16"},{"cvss_score":9.8,"headline":"Apple Memory Corruption","id":"CVE-2022-22587","kev_date_added":"2022-01-28","published":"2022-03-18"},{"cvss_score":9.8,"headline":"Apple iOS, iPadOS, and macOS WebKit Remote Code Execution","id":"CVE-2021-1870","kev_date_added":"2021-11-03","published":"2021-04-02"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2025-11-03","vendors":["n/a"]},"summary":"A use-after-free vulnerability in libarchive allows attackers to execute arbitrary code or cause a denial of service via crafted archives.","url":"https://insights.sbomify.com/CVE-2021-36976/"}