{"api_version":"1","generated_at":"2026-04-23T03:25:17+00:00","cve":"CVE-2021-4206","urls":{"html":"https://cve.report/CVE-2021-4206","api":"https://cve.report/api/cve/CVE-2021-4206.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-4206","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-4206"},"summary":{"title":"CVE-2021-4206","description":"A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2022-04-29 17:15:00","updated_at":"2023-11-07 03:40:00"},"problem_types":["CWE-190","CWE-120","CWE-131"],"metrics":[],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2036998","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2036998","refsource":"MISC","tags":[],"title":"2036998 – (CVE-2021-4206) CVE-2021-4206 QEMU: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html","name":"[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 3099-1] qemu security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.debian.org/security/2022/dsa-5133","name":"DSA-5133","refsource":"DEBIAN","tags":[],"title":"Debian -- Security Information -- DSA-5133-1 qemu","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://starlabs.sg/advisories/21-4206/","name":"https://starlabs.sg/advisories/21-4206/","refsource":"MISC","tags":[],"title":"STAR Labs | Advisories | QEMU QXL Integer overflow leads to Heap Overflow","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://security.gentoo.org/glsa/202208-27","name":"GLSA-202208-27","refsource":"GENTOO","tags":[],"title":"QEMU: Multiple Vulnerabilities (GLSA 202208-27) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-4206","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4206","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"4206","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":"4206","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":"4206","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"qemu","cpe5":"qemu","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4206","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4206","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"advanced_virtualization","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-4206","qid":"160006","title":"Oracle Enterprise Linux Security Update for qemu (ELSA-2022-9669)"},{"cve":"CVE-2021-4206","qid":"160024","title":"Oracle Enterprise Linux Security Update for virt:ol and virt-devel:ol (ELSA-2022-5821)"},{"cve":"CVE-2021-4206","qid":"160027","title":"Oracle Enterprise Linux Security Update for virt:kvm_utils (ELSA-2022-9700)"},{"cve":"CVE-2021-4206","qid":"160134","title":"Oracle Enterprise Linux Security Update for qemu-kvm (ELSA-2022-9869)"},{"cve":"CVE-2021-4206","qid":"160141","title":"Oracle Enterprise Linux Security Update for kvm_utils2 (ELSA-2022-9862)"},{"cve":"CVE-2021-4206","qid":"179273","title":"Debian Security Update for qemu (DSA 5133-1)"},{"cve":"CVE-2021-4206","qid":"180995","title":"Debian Security Update for qemu (DLA 3099-1)"},{"cve":"CVE-2021-4206","qid":"184245","title":"Debian Security Update for qemu (CVE-2021-4206)"},{"cve":"CVE-2021-4206","qid":"198837","title":"Ubuntu Security Notification for QEMU Vulnerabilities (USN-5489-1)"},{"cve":"CVE-2021-4206","qid":"240585","title":"Red Hat Update for virt:rhel and virt-devel:rhel security (RHSA-2022:5821)"},{"cve":"CVE-2021-4206","qid":"377638","title":"Alibaba Cloud Linux Security Update for virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0168)"},{"cve":"CVE-2021-4206","qid":"710604","title":"Gentoo Linux QEMU Multiple Vulnerabilities (GLSA 202208-27)"},{"cve":"CVE-2021-4206","qid":"752284","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2022:2254-1)"},{"cve":"CVE-2021-4206","qid":"752288","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2022:2260-1)"},{"cve":"CVE-2021-4206","qid":"752675","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2022:3594-1)"},{"cve":"CVE-2021-4206","qid":"752725","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2022:3768-1)"},{"cve":"CVE-2021-4206","qid":"753802","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2023:0761-1)"},{"cve":"CVE-2021-4206","qid":"901290","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (9625)"},{"cve":"CVE-2021-4206","qid":"901661","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (9618)"},{"cve":"CVE-2021-4206","qid":"902306","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (9618-1)"},{"cve":"CVE-2021-4206","qid":"902505","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (9625-1)"},{"cve":"CVE-2021-4206","qid":"940607","title":"AlmaLinux Security Update for virt:rhel and virt-devel:rhel (ALSA-2022:5821)"},{"cve":"CVE-2021-4206","qid":"960299","title":"Rocky Linux Security Update for virt:rhel and virt-devel:rhel (RLSA-2022:5821)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-4206","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"QEMU","version":{"version_data":[{"version_value":"qemu-kvm 7.0.0"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-190->CWE-131->CWE-120"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2036998","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2036998"},{"refsource":"MISC","name":"https://starlabs.sg/advisories/21-4206/","url":"https://starlabs.sg/advisories/21-4206/"},{"refsource":"DEBIAN","name":"DSA-5133","url":"https://www.debian.org/security/2022/dsa-5133"},{"refsource":"GENTOO","name":"GLSA-202208-27","url":"https://security.gentoo.org/glsa/202208-27"},{"refsource":"MLIST","name":"[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update","url":"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"}]},"description":{"description_data":[{"lang":"eng","value":"A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process."}]}},"nvd":{"publishedDate":"2022-04-29 17:15:00","lastModifiedDate":"2023-11-07 03:40:00","problem_types":["CWE-190","CWE-120","CWE-131"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH"},"exploitabilityScore":1.5,"impactScore":6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:P/I:P/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":4.6},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.4,"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:qemu:qemu:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.0","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"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":"4206","Ordinal":"225860","Title":"CVE-2021-4206","CVE":"CVE-2021-4206","Year":"2021"},"notes":[]}}}