{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-3812 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-3812 is a high-severity memory corruption vulnerability in Linux kernel, published on 24 Jul 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-2023-3812 and fix it if it is affected.\n\nWhat it is: CVE-2023-3812 is a high-severity memory corruption vulnerability in Linux kernel, published on 24 Jul 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-2023-3812 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2023-3812/ (Markdown: https://insights.sbomify.com/CVE-2023-3812/index.md)","id":"CVE-2023-3812","markdown":"https://insights.sbomify.com/CVE-2023-3812/index.md","name":"CVE-2023-3812","record":{"aliases":["AZL-27764","DEBIAN-CVE-2023-3812","GHSA-v4mv-7g6h-5vh8","RHSA-2024:1961","UBUNTU-CVE-2023-3812"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel TUN driver","requires_auth":"low_privilege","summary":"A local attacker can trigger out-of-bounds memory access in the Linux kernel TUN driver to crash the system or escalate privileges.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"linux_kernel","vendor":"linux"},{"product":"enterprise_linux","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"},{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.","ecosystems":["Red Hat:rhel_e4s:8.2::baseos"],"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":"Kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags","id":"CVE-2023-3812","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel","redhat:enterprise_linux"],"type":"memory_corruption","year":"2023"},"n_packages":9,"n_references":26,"next":{"headline":"Jupiter X Core \u003c= 4.6.6 - Unauthenticated Arbitrary File Download","id":"CVE-2023-3813"},"packages":[{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-4.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_116_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_116_1","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-4.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_116_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_116_1-debuginfo","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-4.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_116_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_116_1-debugsource","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-3.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_119_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_119_1","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-3.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_119_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_119_1-debuginfo","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-3.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_119_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_119_1-debugsource","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_120_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_120_1","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_120_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_120_1-debuginfo","source":"RHSA-2024:1961"},{"ecosystem":"Red Hat:rhel_e4s:8.2::baseos","fixed":["0:1-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-193_120_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-193_120_1-debugsource","source":"RHSA-2024:1961"}],"prev":{"headline":"Hospital Management System patientprofile.php sql injection","id":"CVE-2023-3811"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions","Red Hat Enterprise Linux 8.2 Advanced Update Support","Red Hat Enterprise Linux 8.2 Telecommunications Update Service","Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions","Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.4 Telecommunications Update Service","Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions","Red Hat Enterprise Linux 8.6 Extended Update Support","Red Hat Enterprise Linux 8.8 Extended Update Support","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.0 Extended Update Support","Red Hat Enterprise Linux 9.2 Extended Update Support","Red Hat Virtualization 4 for Red Hat Enterprise Linux 8"],"published":"2023-07-24","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-26","vendors":["Red Hat"]},"summary":"A local attacker can trigger out-of-bounds memory access in the Linux kernel TUN driver to crash the system or escalate privileges.","url":"https://insights.sbomify.com/CVE-2023-3812/"}