{"id":"CVE-2025-67896","aliases":["DEBIAN-CVE-2025-67896","EUVD-2025-203281","GHSA-6qxw-x3vc-phrg","UBUNTU-CVE-2025-67896"],"status":"published","title":"Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.","description":"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.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0047,"percentile":0.40911,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-122"],"published":"2025-12-14T04:00:24Z","modified":"2026-10-28T02:30:21Z","fixes":[{"ecosystem":"Debian:14","package":"exim4","fixed_in":["4.99-7"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"exim4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.99-7"}]}],"versions":["4.98.2-1","4.98.2-1+hurd.1","4.98.2-2","4.99-1","4.99-2","4.99-3","4.99-4","4.99-4~bpo13+1","4.99-5","4.99-6","4.99-6~bpo13+1","4.99-7~bpo13+1","4.99~RC1-1","4.99~RC2-1","4.99~RC3-1","4.99~RC3-2"]}],"products":[{"vendor":"exim","product":"exim"}],"references":[{"url":"https://www.openwall.com/lists/oss-security/2025/12/11/2","tags":["Mailing List","web","report"]},{"url":"https://exim.org/static/doc/security/","tags":["Vendor Advisory","web","report"]},{"url":"https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt","tags":["Vendor Advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2025/12/14/1","tags":["Mailing List","web","report"]},{"url":"http://www.openwall.com/lists/oss-security/2025/12/18/3","tags":["Mailing List","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67896","tags":["advisory"]},{"url":"https://exim.org/static/doc/security"},{"url":"https://github.com/advisories/GHSA-6qxw-x3vc-phrg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67896.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-67896","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-67896","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-67896","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-67896","description":"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.","status":"published","published":"2025-12-14T04:00:24.337Z","modified":"2025-12-18T23:04:16.938Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:32:52.21763Z"}],"euvd":[{"id":"EUVD-2025-203281","description":"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.","status":"published","published":"2025-12-14T04:00:24Z","modified":"2025-12-18T23:04:16Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T19:49:02.571203Z"}],"ghsa":[{"id":"GHSA-6qxw-x3vc-phrg","title":"Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.","description":"Exim before 4.99.1 allows remote heap corruption 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validation.","status":"published","published":"2025-12-14T04:15:50.287Z","modified":"2026-10-14T13:10:00.187Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:11:50.400521Z"}],"osv":[{"id":"CVE-2025-67896","description":"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.","status":"published","published":"2025-12-14T04:00:24.337Z","modified":"2026-10-28T02:30:21.414600581Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:44:52.53036Z"},{"id":"DEBIAN-CVE-2025-67896","description":"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.","status":"published","published":"2025-12-14T04:15:50.287Z","modified":"2026-10-15T09:47:31.716784787Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:47.697959Z"},{"id":"UBUNTU-CVE-2025-67896","description":"Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.","status":"withdrawn","published":"2025-12-14T04:15:00Z","modified":"2025-12-19T20:16:29.446063Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T16:55:52.345622Z"}]}}