{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-4011 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-4011 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Dec 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-2021-4011 and fix it if it is affected.\n\nWhat it is: CVE-2021-4011 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Dec 2021. 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-2021-4011 in the wild and no public exploit code.\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-2021-4011/ (Markdown: https://insights.sbomify.com/CVE-2021-4011/index.md)","id":"CVE-2021-4011","markdown":"https://insights.sbomify.com/CVE-2021-4011/index.md","name":"CVE-2021-4011","record":{"aliases":["DEBIAN-CVE-2021-4011","GHSA-pxmq-rrfv-xh8v","SUSE-SU-2021:14867-1","UBUNTU-CVE-2021-4011"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"X11 server","requires_auth":"low_privilege","summary":"An out-of-bounds access in the X11 server allows attackers to compromise data confidentiality, integrity, and system availability.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"x_server","vendor":"x.org"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","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-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.","ecosystems":["SUSE:Linux Enterprise Point of Sale 11 SP3","SUSE:Linux Enterprise Server 11 SP4-LTSS"],"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":"Memory corruption in xorg-x11-server","id":"CVE-2021-4011","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","x.org:x_server"],"type":"memory_corruption","year":"2021"},"n_packages":2,"n_references":11,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-4014"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Point of Sale 11 SP3","fixed":["7.4-27.122.46.1"],"introduced":["0"],"last_affected":[],"package":"xorg-x11-server","purl":"pkg:rpm/suse/xorg-x11-server\u0026distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3","source":"SUSE-SU-2021:14867-1"},{"ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","fixed":["7.4-27.122.46.1"],"introduced":["0"],"last_affected":[],"package":"xorg-x11-server","purl":"pkg:rpm/suse/xorg-x11-server\u0026distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS","source":"SUSE-SU-2021:14867-1"}],"prev":{"headline":"Memory corruption in xorg-x11-server","id":"CVE-2021-4010"},"products":["xorg-x11-server"],"published":"2021-12-17","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":"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":"2024-08-03","vendors":["n/a"]},"summary":"An out-of-bounds access in the X11 server allows attackers to compromise data confidentiality, integrity, and system availability.","url":"https://insights.sbomify.com/CVE-2021-4011/"}