{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-6683 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-6683 is a medium-severity vulnerability in Qemu Qemu, published on 12 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-6683 and fix it if it is affected.\n\nWhat it is: CVE-2023-6683 is a medium-severity vulnerability in Qemu Qemu, published on 12 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-6683 in the wild and no public exploit code.\n\nAffected product: Qemu Qemu. 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-2023-6683/ (Markdown: https://insights.sbomify.com/CVE-2023-6683/index.md)","id":"CVE-2023-6683","markdown":"https://insights.sbomify.com/CVE-2023-6683/index.md","name":"CVE-2023-6683","record":{"aliases":["AZL-40048","AZL-43054","BELL-CVE-2023-6683","DEBIAN-CVE-2023-6683","GHSA-x9c6-9g9w-hg73","UBUNTU-CVE-2023-6683"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"QEMU VNC server","requires_auth":"low_privilege","summary":"A malicious authenticated VNC client can crash QEMU via a null pointer dereference in the clipboard request handler, causing denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"qemu","vendor":"qemu"},{"product":"enterprise_linux","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.","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":"Qemu: vnc: null pointer dereference in qemu_clipboard_request()","id":"CVE-2023-6683","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"qemu:qemu","products":["qemu:qemu","redhat:enterprise_linux"],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"Ibtana – WordPress Website Builder \u003c= 1.2.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode","id":"CVE-2023-6684"},"packages":[],"prev":{"headline":"Inefficient Regular Expression Complexity in GitLab","id":"CVE-2023-6682"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8 Advanced Virtualization","Red Hat Enterprise Linux 9"],"published":"2024-01-12","related":[{"cvss_score":10,"headline":"Null dereference in n/a","id":"CVE-2022-36648","kev_date_added":null,"published":"2023-08-22"},{"cvss_score":10,"headline":"Race condition in n/a","id":"CVE-2015-8556","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.9,"headline":"Use after free in n/a","id":"CVE-2009-3616","kev_date_added":null,"published":"2009-10-23"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2019-12928","kev_date_added":null,"published":"2019-06-24"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2019-12929","kev_date_added":null,"published":"2019-06-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2018-20815","kev_date_added":null,"published":"2019-05-31"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-8380","kev_date_added":null,"published":"2017-08-28"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-25","vendors":["Red Hat"]},"summary":"A malicious authenticated VNC client can crash QEMU via a null pointer dereference in the clipboard request handler, causing denial of service.","url":"https://insights.sbomify.com/CVE-2023-6683/"}