CVE-2025-68383

Process crash via unchecked parser offsets

Published Dec 18, 2025 · Updated Dec 18, 2025

Improper offset validation in Elastic Filebeat allows attackers to crash the process via a malformed Syslog message or Dissect pattern. The Syslog parser and Libbeat Dissect processor use input-derived positions without adequate bounds validation, leading to an invalid buffer access and panic. The Syslog path requires reachability to an enabled listener, while the Dissect path requires control of a tokenizer pattern; either interrupts log collection until Filebeat restarts.

CVSS severity6.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper offset validation in Elastic Filebeat allows attackers to crash the process via a malformed Syslog message or Dissect pattern. The Syslog parser and Libbeat Dissect processor use input-derived positions without adequate bounds validation, leading to an invalid buffer access and panic. The Syslog path requires reachability to an enabled listener, while the Dissect path requires control of a tokenizer pattern; either interrupts log collection until Filebeat restarts.

The record

CVE
CVE-2025-68383
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
Elastic
Product
Filebeat
Classifications
CWE-1284, CAPEC-100, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.0 <=7.17.29
  2. Affected versionversion=8.0.0 <=8.19.8
  3. Affected versionversion=9.0.0 <=9.1.8
  4. Affected versionversion=9.2.0 <=9.2.2

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Elastic · Filebeatversion=7.0.0 <=7.17.29; version=8.0.0 <=8.19.8; version=9.0.0 <=9.1.8; version=9.2.0 <=9.2.2

Published CVSS scores

6.5ElasticCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
CAPEC-100Overflow Buffers
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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