CVE-2025-68383

MEDIUM6.5EPSS 0.03%

Filebeat Beats has Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in Dissect Configuration

Published: 12/19/2025Modified: 2/4/2026

Also known as:GHSA-2mj3-6grc-px38CGA-m658-4ww5-36j3GO-2025-4252

Description

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.

Affected packages (4)

Go/github.com/elastic/beatsfrom 0, <= 7.6.2
Go/github.com/elastic/beatsfrom 0
Go/github.com/elastic/beats/v7>= 7.7.0, < 8.19.9
Go/github.com/elastic/beats/v7from 0, < 7.0.0-alpha2.0.20251204214633-dd3af18220bf, >= 7.7.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (7)

ADVISORYhttps://github.com/advisories/GHSA-2mj3-6grc-px38
ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-68383
PATCHhttps://github.com/elastic/elasticsearch
WEBhttps://discuss.elastic.co/t/filebeat-8-19-9-9-1-9-and-9-2-3-security-update-esa-2025-32/384180
WEBhttps://github.com/elastic/beats/commit/27a168fb1c598d4a16748e9a7382bc0d197335a5
WEBhttps://github.com/elastic/beats/commit/2f971a057eea68e057b47829950cd8c26805df30
WEBhttps://github.com/elastic/beats/commit/339fa3f887a14c91e0c955b50a3b8819393bd632