Buffer overflow in Filebeat and Filebeat OSS - CVE-2025-68383
Published: December 19, 2025
Vulnerability identifier: #VU120209
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2025-68383
CWE-ID: CWE-120
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Filebeat
Filebeat OSS
Filebeat OSS
How to mitigate CVE-2025-68383
Install updates from vendor's website.
Filebeat - addressed in versions 8.19.9, 9.1.9, 9.2.3
Filebeat OSS - addressed in versions 8.19.9, 9.1.9, 9.2.3
Filebeat OSS - addressed in versions 8.19.9, 9.1.9, 9.2.3