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CVE-2025-68383

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Date: December 18, 2025

Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2025-68383
https://github.com/elastic/beats/commit/27a168fb1c598d4a16748e9a7382bc0d197335a5
https://github.com/elastic/beats/commit/339fa3f887a14c91e0c955b50a3b8819393bd632
https://github.com/elastic/elasticsearch
https://github.com/elastic/beats/commit/2f971a057eea68e057b47829950cd8c26805df30
https://discuss.elastic.co/t/filebeat-8-19-9-9-1-9-and-9-2-3-security-update-esa-2025-32/384180
https://www.mend.io/vulnerability-database/CVE-2025-68383

Severity Score

Weakness Type (CWE)

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-120

Improper Validation of Specified Quantity in Input

CWE-1284

Top Fix

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Upgrade Version

Upgrade to version github.com/elastic/beats/v7 - v8.19.9;github.com/elastic/beats/v7 - v9.1.9;github.com/elastic/beats/v7 - v9.2.3;github.com/elastic/beats/v7 - v7.0.0-alpha2.0.20251204214633-dd3af18220bf;https://github.com/elastic/beats.git - v9.2.3;https://github.com/elastic/beats.git - v8.19.9;https://github.com/elastic/beats.git - v9.1.9

Learn More

CVSS v3.1

Base Score:
Attack Vector (AV): ADJACENT_NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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