{"id":"CVE-2025-67896","details":"Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.","modified":"2026-08-12T03:51:40.836113518Z","published":"2025-12-14T04:00:24.337Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"4.99"},{"fixed":"4.99.1"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"4.99"},{"fixed":"4.99.1"}],"source":"CPE_FIELD"},{"source":"DESCRIPTION","extracted_events":[{"fixed":"4.99.1"}]}],"cna_assigner":"mitre","cwe_ids":["CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67896.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/12/14/1"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/12/18/3"},{"type":"WEB","url":"https://exim.org/static/doc/security/"},{"type":"WEB","url":"https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2025/12/11/2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67896.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67896"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/exim/exim","events":[{"introduced":"0"},{"fixed":"d46a6727798fc48d1756190a6d46d19216348c25"}],"database_specific":{"cpe":"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.99.1"}],"source":"CPE_RANGE"}}],"versions":["exim-4.99","exim-4.99-RC4","exim-4.99-RC3","exim-4.99-RC2","exim-4.99-RC1","exim-4.98","exim-4.98-RC3","exim-4.98-RC2","exim-4.98-RC1","exim-4.98-RC0","exim-4.97","exim-4.97-RC2","exim-4.96","exim-4.97-RC1","exim-4.97-RC0","exim-4.95","exim-4.96-RC2","exim-4.96-RC1","exim-4.96-RC0","exim-4.95-RC2","exim-4.95-RC1","exim-4.95-RC0","exim-4.94","exim-4.94-RC2","exim-4.94-RC1","exim-4_94_RC0","exim-4.93","exim-4.93-RC7","exim-4.93-RC6","exim-4.93-RC5","exim-4.93-RC4","exim-4.93-RC3","exim-4.93-RC2","exim-4.93-RC1","exim-4.93-RC0","exim-4.92-jgh","exim-4.92-RC6","exim-4.92","exim-4.92-RC5","exim-4.92-RC4","exim-4.92-RC3","exim-4.92-RC2","exim-4.92-RC1","exim-4_91","exim-4_91_RC4","exim-4_91_RC3","exim-4_91_RC2","exim-4_91_RC1","exim-4_90_RC4","exim-4_90","exim-4_90_RC3","exim-4_90_RC2","exim-4_90_RC1","exim-4.90devstart","exim-4_89_RC3","exim-4_89_RC1","exim-4_88","exim-4_87","exim-4_88_RC6","exim-4_88_RC5","exim-4_88_RC4","exim-4_88_RC3","exim-4_88_RC2","exim-4_88_RC1","exim-4_87_RC7","exim-4_87_RC6","exim-4_87_RC5","exim-4_87_RC4","exim-4_84","exim-4_86","exim-4_85","exim-4_87_RC3","exim-4_87_RC2","exim-4_87_RC1","exim-4_86_RC5","exim-4_86_RC4","exim-4_86_RC3","exim-4_86_RC2","exim-4_86_RC1","exim-4_85_RC4","exim-4_85_RC3","exim-4_85_RC2","exim-4_85_RC1","exim-4_84_RC2","exim-4_84_RC1","exim-4_83","exim-4_83_RC3","exim-4_83_RC2","exim-4_83_RC1","exim-4_82","exim-4_82_RC5","exim-4_82_RC4","exim-4_82_RC3","exim-4_82_RC2","exim-4_82_RC1","exim-4_80","exim-4_80_RC7","exim-4_80_RC6","exim-4_80_RC5","exim-4_80_RC4","exim-4_80_RC3","exim-4_80_RC2","exim-4_80_RC1","exim-4_77","exim-4_77_RC4","exim-4_77_RC3","exim-4_77_RC2","exim-4_77_RC1","exim-4_76","exim-4_76_RC2","exim-4_76_RC1","exim-4_75","exim-4_75_RC3","exim-4_75_RC2","exim-4_75_RC1","exim-4_74","exim-4_74_RC1","exim-4_73","exim-4_73_RC1","exim-4_73_RC00","exim-4_72","exim-4_72_RC2","exim-4_72_RC1","exim-4_71","exim-4_70","exim-4_70_RC4","exim-4_70_RC3","DEVEL_PDKIM_START","exim-4_69","exim-4_68","exim-4_67","exim-4_66","exim-4_65","exim-4_64","exim-4_63","exim-4_62","exim-4_61","exim-4_54","exim-4_53","exim-4_52","exim-4_51","exim-4_50"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-67896.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"}]}