Vulnerability · Published Dec 18, 2025 · Assigned by elastic
CVE-2025-68383Filebeat Improper Validation of Specified Index, Position, or Offset in Input
Medium 6.5
In plain English
A medium-severity security flaw in Filebeat from Elastic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/elastic/beats | no fix listed | GO-2025-4252 |
| Go | github.com/elastic/beats | no fix listed | GO-2025-4252 |
| Go | github.com/elastic/beats | no fix listed | GHSA-2mj3-6grc-px38 |
| Go | github.com/elastic/beats/v7 | 7.0.0-alpha2.0.20251204214633-dd3af18220bf | GHSA-2mj3-6grc-px38 |
| Go | github.com/elastic/beats/v7 | 8.19.9 | GHSA-2mj3-6grc-px38 |
| Go | github.com/elastic/beats/v7 | 7.0.0-alpha2.0.20251204214633-dd3af18220bf | GO-2025-4252 |
| Go | github.com/elastic/beats/v7 | 9.1.9 | GHSA-2mj3-6grc-px38 |
| Go | github.com/elastic/beats/v7 | 9.2.3 | GHSA-2mj3-6grc-px38 |
Affected products (as reported)
Weakness: CWE-1284 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H