{"api_version":"1","generated_at":"2026-04-23T03:25:17+00:00","cve":"CVE-2021-3682","urls":{"html":"https://cve.report/CVE-2021-3682","api":"https://cve.report/api/cve/CVE-2021-3682.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3682","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3682"},"summary":{"title":"CVE-2021-3682","description":"A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2021-08-05 20:15:00","updated_at":"2023-03-31 18:26:00"},"problem_types":["CWE-763"],"metrics":[],"references":[{"url":"https://www.debian.org/security/2021/dsa-4980","name":"DSA-4980","refsource":"DEBIAN","tags":[],"title":"Debian -- Security Information -- DSA-4980-1 qemu","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://lists.debian.org/debian-lts-announce/2021/09/msg00000.html","name":"[debian-lts-announce] 20210902 [SECURITY] [DLA 2753-1] qemu security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2753-1] qemu security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://security.netapp.com/advisory/ntap-20210902-0006/","name":"https://security.netapp.com/advisory/ntap-20210902-0006/","refsource":"CONFIRM","tags":[],"title":"CVE-2021-3682 QEMU Vulnerability in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1989651","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1989651","refsource":"MISC","tags":[],"title":"1989651 – (CVE-2021-3682) CVE-2021-3682 QEMU: usbredir: free call on invalid pointer in bufp_alloc()","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-2021-3682","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3682","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"3682","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":"3682","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":"3682","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":"3682","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":"3682","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"qemu","cpe5":"qemu","cpe6":"6.1.0","cpe7":"-","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3682","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"qemu","cpe5":"qemu","cpe6":"6.1.0","cpe7":"rc1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3682","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":"3682","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-2021-3682","qid":"159582","title":"Oracle Enterprise Linux Security Update for qemu (ELSA-2021-9638)"},{"cve":"CVE-2021-3682","qid":"159672","title":"Oracle Enterprise Linux Security Update for kvm_utils (ELSA-2022-9172)"},{"cve":"CVE-2021-3682","qid":"178782","title":"Debian Security Update for qemu (DLA 2753-1)"},{"cve":"CVE-2021-3682","qid":"178817","title":"Debian Security Update for qemu (DSA 4980-1)"},{"cve":"CVE-2021-3682","qid":"180995","title":"Debian Security Update for qemu (DLA 3099-1)"},{"cve":"CVE-2021-3682","qid":"183794","title":"Debian Security Update for qemu (CVE-2021-3682)"},{"cve":"CVE-2021-3682","qid":"198683","title":"Ubuntu Security Notification for QEMU Vulnerabilities (USN-5307-1)"},{"cve":"CVE-2021-3682","qid":"199069","title":"Ubuntu Security Notification for QEMU Vulnerabilities (USN-5772-1)"},{"cve":"CVE-2021-3682","qid":"502356","title":"Alpine Linux Security Update for qemu"},{"cve":"CVE-2021-3682","qid":"671198","title":"EulerOS Security Update for qemu (EulerOS-SA-2022-1034)"},{"cve":"CVE-2021-3682","qid":"671203","title":"EulerOS Security Update for qemu (EulerOS-SA-2022-1014)"},{"cve":"CVE-2021-3682","qid":"710604","title":"Gentoo Linux QEMU Multiple Vulnerabilities (GLSA 202208-27)"},{"cve":"CVE-2021-3682","qid":"750995","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:2813-1)"},{"cve":"CVE-2021-3682","qid":"751013","title":"OpenSUSE Security Update for qemu (openSUSE-SU-2021:2789-1)"},{"cve":"CVE-2021-3682","qid":"751053","title":"OpenSUSE Security Update for qemu (openSUSE-SU-2021:1202-1)"},{"cve":"CVE-2021-3682","qid":"751068","title":"OpenSUSE Security Update for qemu (openSUSE-SU-2021:2858-1)"},{"cve":"CVE-2021-3682","qid":"751322","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:3614-1)"},{"cve":"CVE-2021-3682","qid":"751323","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:3613-1)"},{"cve":"CVE-2021-3682","qid":"751330","title":"OpenSUSE Security Update for qemu (openSUSE-SU-2021:3614-1)"},{"cve":"CVE-2021-3682","qid":"751338","title":"SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:3635-1)"},{"cve":"CVE-2021-3682","qid":"900293","title":"CBL-Mariner Linux Security Update for qemu-kvm 4.2.0"},{"cve":"CVE-2021-3682","qid":"901920","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (6830)"},{"cve":"CVE-2021-3682","qid":"902070","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (6830-1)"},{"cve":"CVE-2021-3682","qid":"902791","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (5125)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-3682","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 6.1.0-rc2"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-763"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1989651","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1989651"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20210902-0006/","url":"https://security.netapp.com/advisory/ntap-20210902-0006/"},{"refsource":"MLIST","name":"[debian-lts-announce] 20210902 [SECURITY] [DLA 2753-1] qemu security update","url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html"},{"refsource":"DEBIAN","name":"DSA-4980","url":"https://www.debian.org/security/2021/dsa-4980"},{"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 USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host."}]}},"nvd":{"publishedDate":"2021-08-05 20:15:00","lastModifiedDate":"2023-03-31 18:26:00","problem_types":["CWE-763"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.5,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":6},"severity":"MEDIUM","exploitabilityScore":6.8,"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:6.1.0:rc1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.0","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: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":"3682","Ordinal":"213717","Title":"CVE-2021-3682","CVE":"CVE-2021-3682","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"3682","Ordinal":"1","NoteData":"A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"3682","Ordinal":"2","NoteData":"2021-08-05","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"3682","Ordinal":"3","NoteData":"2021-10-04","Type":"Other","Title":"Modified"}]}}}