#VU120209 Buffer overflow in Filebeat OSS and Filebeat - CVE-2025-68383
Published: December 19, 2025
Vulnerability identifier: #VU120209
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-68383
CWE-ID: CWE-120
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Filebeat OSS
Filebeat
Filebeat OSS
Filebeat
Software vendor:
Elastic Stack
Elastic Stack
Description
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to a boundary error within the Filebeat Syslog parser and the Libbeat Dissect processor. A remote attacker can pass specially crafted input to the system that will be logged in a Syslog message or use a malicious tokenizer pattern in the Dissect configuration to trigger buffer overflow and perform a denial of service attack.
Remediation
Install updates from vendor's website.