CVE-2025-67896

critical

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.

References

https://www.openwall.com/lists/oss-security/2025/12/11/2

https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt

https://exim.org/static/doc/security/

http://www.openwall.com/lists/oss-security/2025/12/18/3

http://www.openwall.com/lists/oss-security/2025/12/14/1

Details

Source: Mitre, NVD

Published: 2025-12-14

Updated: 2025-12-22

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H