{"api_version":"1","generated_at":"2026-04-22T23:52:42+00:00","cve":"CVE-2021-3635","urls":{"html":"https://cve.report/CVE-2021-3635","api":"https://cve.report/api/cve/CVE-2021-3635.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3635","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3635"},"summary":{"title":"CVE-2021-3635","description":"A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2021-08-13 14:15:00","updated_at":"2021-08-23 20:33:00"},"problem_types":["CWE-119"],"metrics":[],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1976946","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1976946","refsource":"MISC","tags":[],"title":"1976946 – (CVE-2021-3635) CVE-2021-3635 kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3635","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3635","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"3635","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":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc2","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc3","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc4","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc5","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"5.5","cpe7":"rc6","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"6.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"7.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3635","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":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-3635","qid":"159492","title":"Oracle Enterprise Linux Security Update for kernel (ELSA-2021-4356)"},{"cve":"CVE-2021-3635","qid":"180549","title":"Debian Security Update for linux (CVE-2021-3635)"},{"cve":"CVE-2021-3635","qid":"239816","title":"Red Hat Update for kernel security (RHSA-2021:4356)"},{"cve":"CVE-2021-3635","qid":"239879","title":"Red Hat Update for kernel-rt (RHSA-2021:4140)"},{"cve":"CVE-2021-3635","qid":"610418","title":"Google Pixel Android June 2022 Security Patch Missing"},{"cve":"CVE-2021-3635","qid":"610422","title":"Google Android July 2022 Security Patch Missing for Huawei EMUI"},{"cve":"CVE-2021-3635","qid":"671219","title":"EulerOS Security Update for kernel (EulerOS-SA-2022-1030)"},{"cve":"CVE-2021-3635","qid":"671288","title":"EulerOS Security Update for kernel (EulerOS-SA-2022-1227)"},{"cve":"CVE-2021-3635","qid":"940265","title":"AlmaLinux Security Update for kernel (ALSA-2021:4356)"},{"cve":"CVE-2021-3635","qid":"960044","title":"Rocky Linux Security Update for kernel (RLSA-2021:4356)"},{"cve":"CVE-2021-3635","qid":"960065","title":"Rocky Linux Security Update for kernel-rt (RLSA-2021:4140)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-3635","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"kernel","version":{"version_data":[{"version_value":"kernel 5.5-rc7"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-119"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1976946","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1976946"}]},"description":{"description_data":[{"lang":"eng","value":"A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands."}]}},"nvd":{"publishedDate":"2021-08-13 14:15:00","lastModifiedDate":"2021-08-23 20:33:00","problem_types":["CWE-119"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":4.4,"baseSeverity":"MEDIUM"},"exploitabilityScore":0.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:N/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":4.9},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.9,"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:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.5","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc2:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc3:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc4:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc5:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:5.5:rc6:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*","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:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"3635","Ordinal":"211676","Title":"CVE-2021-3635","CVE":"CVE-2021-3635","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"3635","Ordinal":"1","NoteData":"A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"3635","Ordinal":"2","NoteData":"2021-08-13","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"3635","Ordinal":"3","NoteData":"2021-08-13","Type":"Other","Title":"Modified"}]}}}