Buffer Overflow Vulnerability in Filebeat Syslog Parser by Elastic
CVE-2025-68383

6.5MEDIUM

Key Information:

Vendor

Elastic
Status
Filebeat
Vendor
CVE Published:
18 December 2025

What is CVE-2025-68383?

A vulnerability exists within the Filebeat Syslog parser and the Libbeat Dissect processor that stems from improper validation techniques. This issue can be exploited by sending a specially crafted Syslog message or using a malicious tokenizer pattern in the Dissect configuration. Successful exploitation may lead to a buffer overflow, resulting in a denial of service condition, where the Filebeat process may crash or panic, compromising system availability.

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Affected Version(s)

Filebeat 7.0.0 <= 7.17.29

Filebeat 8.0.0 <= 8.19.8

Filebeat 9.0.0 <= 9.1.8

References

https://discuss.elastic.co/t/filebeat-8-19-9-9-1-9-and-9-...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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