CVE-2025-67896

State: Published
Severity: 7.0 High
Published: Dec 14, 2025
Updated: Dec 18, 2025
Reserved: Dec 14, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L	mitre

Weaknesses

CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
EximExim	4.99 to before 4.99.1Affected

References

https://www.openwall.com/lists/oss-security/2025/12/11/2
https://exim.org/static/doc/security/
https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt
http://www.openwall.com/lists/oss-security/2025/12/14/1
http://www.openwall.com/lists/oss-security/2025/12/18/3

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