SB2025121922 - Remote denial of service in Elastic Filebeat
Published: December 19, 2025
Security Bulletin ID
SB2025121922
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2025-68383)
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 update from vendor's website.