{"answers":{"affected":"It affects 3 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3347 exists.","fix":"Apply the vendor's patch.","what":"CVE-2021-3347 is a high-severity use after free vulnerability in Debian Debian Linux, published on 29 Jan 2021. 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-2021-3347 and fix it if it is affected.\n\nWhat it is: CVE-2021-3347 is a high-severity use after free vulnerability in Debian Debian Linux, published on 29 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3347 exists.\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-2021-3347/ (Markdown: https://insights.sbomify.com/CVE-2021-3347/index.md)","id":"CVE-2021-3347","markdown":"https://insights.sbomify.com/CVE-2021-3347/index.md","name":"CVE-2021-3347","record":{"aliases":["A-171705902","ASB-A-171705902","DEBIAN-CVE-2021-3347","GHSA-8r42-h5pm-2vw2","MGASA-2021-0062","RHSA-2021:2285","UBUNTU-CVE-2021-3347"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"Local attackers can exploit a use-after-free in PI futexes to execute arbitrary code in the kernel, leading to privilege escalation.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cisa-adp","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":"An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.","ecosystems":["Red Hat:enterprise_linux:7::server"],"exploits":{"exploitdb":0,"first_seen":"2022-04-26","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2022-04-26T11:32:34Z","kind":"github_poc","ref":"https://github.com/nanopathi/linux-4.19.72_CVE-2021-3347","stars":0,"title":null}],"tier":"weaponised"},"has_fix":true,"headline":"Use after free in n/a","id":"CVE-2021-3347","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","linux:linux_kernel"],"type":"use_after_free","year":"2021"},"n_packages":18,"n_references":19,"next":{"headline":"Use after free in n/a","id":"CVE-2021-3348"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-5.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_11_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_11_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-5.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_11_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_11_1-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-5.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_15_2","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_15_2","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-5.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_15_2-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_15_2-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-3.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_21_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_21_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-3.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_21_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_21_1-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-1.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_24_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_24_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-1.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_24_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_24_1-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-1.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_25_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_25_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-1.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_25_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_25_1-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_2_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_2_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_2_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_2_1-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_2_2","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_2_2","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_2_2-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_2_2-debuginfo","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_6_1","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_6_1","source":"RHSA-2021:2285"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1-6.el7"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-3_10_0-1160_6_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-3_10_0-1160_6_1-debuginfo","source":"RHSA-2021:2285"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-3346"},"products":["n/a"],"published":"2021-01-29","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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-25","vendors":["n/a"]},"summary":"Local attackers can exploit a use-after-free in PI futexes to execute arbitrary code in the kernel, leading to privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-3347/"}