{"answers":{"affected":"It affects 8 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4147 exists.","fix":"Apply the vendor's patch.","what":"CVE-2023-4147 is a high-severity use after free vulnerability in Debian Debian Linux, published on 7 Aug 2023. 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-2023-4147 and fix it if it is affected.\n\nWhat it is: CVE-2023-4147 is a high-severity use after free vulnerability in Debian Debian Linux, published on 7 Aug 2023. 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-2023-4147 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-2023-4147/ (Markdown: https://insights.sbomify.com/CVE-2023-4147/index.md)","id":"CVE-2023-4147","markdown":"https://insights.sbomify.com/CVE-2023-4147/index.md","name":"CVE-2023-4147","record":{"aliases":["AZL-27897","CVE-2023-3995","DEBIAN-CVE-2023-4147","GHSA-pcv9-72q8-27vc","UBUNTU-CVE-2023-4147"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel netfilter","requires_auth":"low_privilege","summary":"A local attacker can exploit a use-after-free in the Linux kernel's netfilter subsystem to crash the system or escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"linux_kernel","vendor":"linux"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_eus","vendor":"redhat"},{"product":"enterprise_linux_for_real_time","vendor":"redhat"},{"product":"enterprise_linux_for_real_time_for_nfv","vendor":"redhat"},{"product":"enterprise_linux_server_aus","vendor":"redhat"}],"cvss":{"score":7.8,"severity":"high","source":"cna","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":"A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2024-12-30","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2024-12-30T18:08:46Z","kind":"github_poc","ref":"https://github.com/murdok1982/Exploit-en-Python-para-CVE-2023-4147","stars":0,"title":"PoC educativo del exploit CVE-2023-4147 (Linux kernel Netfilter UAF) — solo para entornos autorizados"}],"tier":"weaponised"},"has_fix":true,"headline":"Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free","id":"CVE-2023-4147","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","linux:linux_kernel","redhat:enterprise_linux","redhat:enterprise_linux_eus","redhat:enterprise_linux_server_aus"],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":10,"next":{"headline":"Ditty \u003c 3.1.25 - Reflected XSS","id":"CVE-2023-4148"},"packages":[],"prev":{"headline":"Cross-site Scripting (XSS) - Stored in pimcore/customer-data-framework","id":"CVE-2023-4145"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.0 Extended Update Support"],"published":"2023-08-07","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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-25","vendors":["Red Hat"]},"summary":"A local attacker can exploit a use-after-free in the Linux kernel's netfilter subsystem to crash the system or escalate privileges.","url":"https://insights.sbomify.com/CVE-2023-4147/"}