{"cve":{"cve_id":"CVE-2021-43396","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.03293,"epss_percentile":0.88303,"epss_as_of":"2026-10-15","description":"In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states \"the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.","published_at":"2021-11-04T19:52:49Z","last_modified_at":"2026-10-14T12:17:16.160000Z","cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://sourceware.org/bugzilla/show_bug.cgi?id=28524","https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d","https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396","https://www.oracle.com/security-alerts/cpujul2022.html"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-10-14T23:59:09.254433Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"gnu","vendor_name":"gnu","product_slug":"glibc","product_name":"glibc","version_start":"2.34","version_start_inclusive":true,"version_end":"2.34","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:gnu:glibc:2.34:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-binding-support-function","product_name":"communications_cloud_native_core_binding_support_function","version_start":"22.1.3","version_start_inclusive":true,"version_end":"22.1.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-network-function-cloud-native-environment","product_name":"communications_cloud_native_core_network_function_cloud_native_environment","version_start":"22.1.0","version_start_inclusive":true,"version_end":"22.1.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-network-repository-function","product_name":"communications_cloud_native_core_network_repository_function","version_start":"22.1.2","version_start_inclusive":true,"version_end":"22.1.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-network-repository-function","product_name":"communications_cloud_native_core_network_repository_function","version_start":"22.2.0","version_start_inclusive":true,"version_end":"22.2.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-security-edge-protection-proxy","product_name":"communications_cloud_native_core_security_edge_protection_proxy","version_start":"22.1.1","version_start_inclusive":true,"version_end":"22.1.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"communications-cloud-native-core-unified-data-repository","product_name":"communications_cloud_native_core_unified_data_repository","version_start":"22.2.0","version_start_inclusive":true,"version_end":"22.2.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:22.2.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"enterprise-operations-monitor","product_name":"enterprise_operations_monitor","version_start":"4.3","version_start_inclusive":true,"version_end":"4.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:enterprise_operations_monitor:4.3:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"enterprise-operations-monitor","product_name":"enterprise_operations_monitor","version_start":"4.4","version_start_inclusive":true,"version_end":"4.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:enterprise_operations_monitor:4.4:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"enterprise-operations-monitor","product_name":"enterprise_operations_monitor","version_start":"5.0","version_start_inclusive":true,"version_end":"5.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:enterprise_operations_monitor:5.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=28524","source_type":"MISC","tags":[]},{"url":"https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d","source_type":"MISC","tags":[]},{"url":"https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396","source_type":"MISC","tags":[]},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2021-11-04T19:52:49Z","label":"CVE 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