CVE-2025-67896

Summary

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.

Affected Software

Weaknesses

• CWE-122: CWE-122 Heap-based Buffer Overflow

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2025/12/14/1
• http://www.openwall.com/lists/oss-security/2025/12/18/3

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

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

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