{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2023-3777 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-3777 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 6 Sep 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-2023-3777 and fix it if it is affected.\n\nWhat it is: CVE-2023-3777 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 6 Sep 2023. 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-2023-3777 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu 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-2023-3777/ (Markdown: https://insights.sbomify.com/CVE-2023-3777/index.md)","id":"CVE-2023-3777","markdown":"https://insights.sbomify.com/CVE-2023-3777/index.md","name":"CVE-2023-3777","record":{"aliases":["DEBIAN-CVE-2023-3777","GHSA-3v7f-rjgx-9grq","SUSE-SU-2023:4781-1","UBUNTU-CVE-2023-3777"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel netfilter component allows local attackers to escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Google","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"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 vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nWhen nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances.\n\nWe recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.","ecosystems":["SUSE:Linux Enterprise Live Patching 15 SP5"],"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 Linux kernel's netfilter: nf_tables component","id":"CVE-2023-3777","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","linux:linux_kernel"],"type":"use_after_free","year":"2023"},"n_packages":1,"n_references":5,"next":{"headline":"Essential Addons For Elementor \u003c=5.8.1 - Unauthenticated MailChimp API Key Disclosure","id":"CVE-2023-3779"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Live Patching 15 SP5","fixed":["2-150500.2.1"],"introduced":["0"],"last_affected":[],"package":"kernel-livepatch-SLE15-SP5-RT_Update_7","purl":"pkg:rpm/suse/kernel-livepatch-SLE15-SP5-RT_Update_7\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP5","source":"SUSE-SU-2023:4781-1"}],"prev":{"headline":"Use-after-free in Linux kernel's net/sched: cls_fw component","id":"CVE-2023-3776"},"products":["Kernel"],"published":"2023-09-06","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"2026-10-14","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel netfilter component allows local attackers to escalate privileges.","url":"https://insights.sbomify.com/CVE-2023-3777/"}