{"api_version":"1","generated_at":"2026-04-23T02:20:13+00:00","cve":"CVE-2021-4009","urls":{"html":"https://cve.report/CVE-2021-4009","api":"https://cve.report/api/cve/CVE-2021-4009.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-4009","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-4009"},"summary":{"title":"CVE-2021-4009","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 SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2021-12-17 17:15:00","updated_at":"2023-11-07 03:40:00"},"problem_types":["CWE-119"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57DCF726O5LLTST4NBL5PQ7DLPB46HT/","name":"FEDORA-2021-a7fd510294","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: xorg-x11-server-1.20.14-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.x.org/archives/xorg-announce/2021-December/003124.html","name":"https://lists.x.org/archives/xorg-announce/2021-December/003124.html","refsource":"MISC","tags":[],"title":"[ANNOUNCE] xorg-server 1.20.14","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://security.gentoo.org/glsa/202305-30","name":"GLSA-202305-30","refsource":"GENTOO","tags":[],"title":"X.Org X server, XWayland: Multiple Vulnerabilities (GLSA 202305-30) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.x.org/archives/xorg-announce/2021-December/003122.html","name":"https://lists.x.org/archives/xorg-announce/2021-December/003122.html","refsource":"MISC","tags":[],"title":"X.Org Security Advisory: December 14, 2021","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00035.html","name":"[debian-lts-announce] 20211229 [SECURITY] [DLA 2869-1] xorg-server security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2869-1] xorg-server security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PDHYZM6FII35JA7J275MFCJO6ADJUPQX/","name":"FEDORA-2021-2eb603951b","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: xorg-x11-server-Xwayland-21.1.4-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDHYZM6FII35JA7J275MFCJO6ADJUPQX/","name":"FEDORA-2021-2eb603951b","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: xorg-x11-server-Xwayland-21.1.4-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-1548/","name":"https://www.zerodayinitiative.com/advisories/ZDI-21-1548/","refsource":"MISC","tags":[],"title":"ZDI-21-1548 | Zero Day Initiative","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKLSZCY47QK4RCJFXITYFALCGPJAFXOK/","name":"FEDORA-2021-69e96c8f68","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: xorg-x11-server-Xwayland-21.1.4-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKLSZCY47QK4RCJFXITYFALCGPJAFXOK/","name":"FEDORA-2021-69e96c8f68","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: xorg-x11-server-Xwayland-21.1.4-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXTRPFEQLFZ6NT2LPLZEID664RGC3OCC/","name":"FEDORA-2021-664a6554a1","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: xorg-x11-server-1.20.14-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T57DCF726O5LLTST4NBL5PQ7DLPB46HT/","name":"FEDORA-2021-a7fd510294","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: xorg-x11-server-1.20.14-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.debian.org/security/2021/dsa-5027","name":"DSA-5027","refsource":"DEBIAN","tags":[],"title":"Debian -- Security Information -- DSA-5027-1 xorg-server","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NXTRPFEQLFZ6NT2LPLZEID664RGC3OCC/","name":"FEDORA-2021-664a6554a1","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: xorg-x11-server-1.20.14-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://security.netapp.com/advisory/ntap-20220114-0004/","name":"https://security.netapp.com/advisory/ntap-20220114-0004/","refsource":"CONFIRM","tags":[],"title":"January 2022 X.Org X Server Vulnerabilities in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-4009","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4009","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"11.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"34","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"35","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"x.org","cpe5":"x_server","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"x.org","cpe5":"x_server","cpe6":"21.1.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4009","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"x.org","cpe5":"x_server","cpe6":"21.1.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-4009","qid":"159586","title":"Oracle Enterprise Linux Security Update for xorg-x11-server (ELSA-2022-0003)"},{"cve":"CVE-2021-4009","qid":"159803","title":"Oracle Enterprise Linux Security Update for xorg-x11-server and xorg-x11-server-xwayland (ELSA-2022-1917)"},{"cve":"CVE-2021-4009","qid":"178949","title":"Debian Security Update for xorg-server (DSA 5027-1)"},{"cve":"CVE-2021-4009","qid":"178976","title":"Debian Security Update for xorg-server (DLA 2869-1)"},{"cve":"CVE-2021-4009","qid":"183004","title":"Debian Security Update for xwaylandxorg-server (CVE-2021-4009)"},{"cve":"CVE-2021-4009","qid":"198603","title":"Ubuntu Security Notification for X.Org X Server Vulnerabilities (USN-5193-1)"},{"cve":"CVE-2021-4009","qid":"199621","title":"Ubuntu Security Notification for X.Org X Server Vulnerabilities (USN-5193-3)"},{"cve":"CVE-2021-4009","qid":"239982","title":"Red Hat Update for xorg-x11-server (RHSA-2022:0003)"},{"cve":"CVE-2021-4009","qid":"240317","title":"Red Hat Update for xorg-x11-server and xorg-x11-server-xwayland (RHSA-2022:1917)"},{"cve":"CVE-2021-4009","qid":"257140","title":"CentOS Security Update for xorg-x11-server (CESA-2022:0003)"},{"cve":"CVE-2021-4009","qid":"282172","title":"Fedora Security Update for xorg (FEDORA-2021-2eb603951b)"},{"cve":"CVE-2021-4009","qid":"282178","title":"Fedora Security Update for xorg (FEDORA-2021-a7fd510294)"},{"cve":"CVE-2021-4009","qid":"282210","title":"Fedora Security Update for xorg (FEDORA-2021-69e96c8f68)"},{"cve":"CVE-2021-4009","qid":"282214","title":"Fedora Security Update for xorg (FEDORA-2021-664a6554a1)"},{"cve":"CVE-2021-4009","qid":"296061","title":"Oracle Solaris 11.4 Support Repository Update (SRU) 42.113.1 Missing (CPUJAN2022)"},{"cve":"CVE-2021-4009","qid":"353119","title":"Amazon Linux Security Advisory for xorg-x11-server : ALAS2-2022-1744"},{"cve":"CVE-2021-4009","qid":"354703","title":"Amazon Linux Security Advisory for xorg-x11-server : ALAS2022-2022-209"},{"cve":"CVE-2021-4009","qid":"355170","title":"Amazon Linux Security Advisory for xorg-x11-server : ALAS2023-2023-102"},{"cve":"CVE-2021-4009","qid":"377217","title":"Alibaba Cloud Linux Security Update for xorg-x11-server (ALINUX2-SA-2022:0001)"},{"cve":"CVE-2021-4009","qid":"502202","title":"Alpine Linux Security Update for xorg-server"},{"cve":"CVE-2021-4009","qid":"502404","title":"Alpine Linux Security Update for xwayland"},{"cve":"CVE-2021-4009","qid":"671362","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1298)"},{"cve":"CVE-2021-4009","qid":"671388","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1314)"},{"cve":"CVE-2021-4009","qid":"671393","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1340)"},{"cve":"CVE-2021-4009","qid":"671430","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1364)"},{"cve":"CVE-2021-4009","qid":"671492","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1480)"},{"cve":"CVE-2021-4009","qid":"671537","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1471)"},{"cve":"CVE-2021-4009","qid":"671707","title":"EulerOS Security Update for xorg-x11-server (EulerOS-SA-2022-1773)"},{"cve":"CVE-2021-4009","qid":"710738","title":"Gentoo Linux X.Org X server, XWayland Multiple Vulnerabilities (GLSA 202305-30)"},{"cve":"CVE-2021-4009","qid":"730409","title":"McAfee Web Gateway Multiple Vulnerabilities (WP-4451,WP-4134,WP-4350,WP-4331,WP-4408,WP-4440,WP-4444,WP-4518,WP-4347,WP-4416)"},{"cve":"CVE-2021-4009","qid":"751529","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4122-1)"},{"cve":"CVE-2021-4009","qid":"751530","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4124-1)"},{"cve":"CVE-2021-4009","qid":"751531","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4121-1)"},{"cve":"CVE-2021-4009","qid":"751532","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4120-1)"},{"cve":"CVE-2021-4009","qid":"751533","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4119-1)"},{"cve":"CVE-2021-4009","qid":"751537","title":"SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2021:4136-1)"},{"cve":"CVE-2021-4009","qid":"751538","title":"OpenSUSE Security Update for xorg-x11-server (openSUSE-SU-2021:4136-1)"},{"cve":"CVE-2021-4009","qid":"751545","title":"OpenSUSE Security Update for xorg-x11-server (openSUSE-SU-2021:1606-1)"},{"cve":"CVE-2021-4009","qid":"751754","title":"OpenSUSE Security Update for xorg-x11-server (openSUSE-SU-2021:4136-2)"},{"cve":"CVE-2021-4009","qid":"940551","title":"AlmaLinux Security Update for xorg-x11-server and xorg-x11-server-Xwayland (ALSA-2022:1917)"},{"cve":"CVE-2021-4009","qid":"960343","title":"Rocky Linux Security Update for xorg-x11-server and xorg-x11-server-Xwayland (RLSA-2022:1917)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-4009","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"xorg-x11-server","version":{"version_data":[{"version_value":"xorg-x11-server 21.1.2, xorg-x11-server 1.20.14"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-119"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://lists.x.org/archives/xorg-announce/2021-December/003122.html","url":"https://lists.x.org/archives/xorg-announce/2021-December/003122.html"},{"refsource":"MISC","name":"https://lists.x.org/archives/xorg-announce/2021-December/003124.html","url":"https://lists.x.org/archives/xorg-announce/2021-December/003124.html"},{"refsource":"FEDORA","name":"FEDORA-2021-2eb603951b","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PDHYZM6FII35JA7J275MFCJO6ADJUPQX/"},{"refsource":"FEDORA","name":"FEDORA-2021-a7fd510294","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T57DCF726O5LLTST4NBL5PQ7DLPB46HT/"},{"refsource":"MISC","name":"https://www.zerodayinitiative.com/advisories/ZDI-21-1548/","url":"https://www.zerodayinitiative.com/advisories/ZDI-21-1548/"},{"refsource":"DEBIAN","name":"DSA-5027","url":"https://www.debian.org/security/2021/dsa-5027"},{"refsource":"MLIST","name":"[debian-lts-announce] 20211229 [SECURITY] [DLA 2869-1] xorg-server security update","url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00035.html"},{"refsource":"FEDORA","name":"FEDORA-2021-69e96c8f68","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKLSZCY47QK4RCJFXITYFALCGPJAFXOK/"},{"refsource":"FEDORA","name":"FEDORA-2021-664a6554a1","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NXTRPFEQLFZ6NT2LPLZEID664RGC3OCC/"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20220114-0004/","url":"https://security.netapp.com/advisory/ntap-20220114-0004/"},{"refsource":"GENTOO","name":"GLSA-202305-30","url":"https://security.gentoo.org/glsa/202305-30"}]},"description":{"description_data":[{"lang":"eng","value":"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 SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."}]}},"nvd":{"publishedDate":"2021-12-17 17:15:00","lastModifiedDate":"2023-11-07 03:40:00","problem_types":["CWE-119"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE","baseScore":7.2},"severity":"HIGH","exploitabilityScore":3.9,"impactScore":10,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*","versionEndExcluding":"1.20.14","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:x.org:x_server:21.1.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:x.org:x_server:21.1.0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"4009","Ordinal":"221863","Title":"CVE-2021-4009","CVE":"CVE-2021-4009","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"4009","Ordinal":"1","NoteData":"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 SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"4009","Ordinal":"2","NoteData":"2021-12-17","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"4009","Ordinal":"3","NoteData":"2022-01-14","Type":"Other","Title":"Modified"}]}}}