---
id: CVE-2026-83600
title: Netdata is an open source observability tool
summary: >-
  Netdata is an open source observability tool. Prior to 2.10.4, an
  authenticated child agent can send an oversized CHART SLOT value that
  str2ull_encoded passes to pluginsd_rrdset_cache_put_to_slot in
  src/plugins.d/pluginsd_internals.h. Th…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-193
  - CWE-400
vendor: netdata
product: netdata
affected:
  - netdata < 2.10.4
published: '2026-09-22'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:28:25.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83600'
references:
  - url: >-
      https://github.com/netdata/netdata/commit/034a774f689ac01488fc261ca729ce0875819b1b
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/pull/22598'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/releases/tag/v2.10.4'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/security/advisories/GHSA-3mxw-fv2x-rhc6'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/security/advisories/GHSA-3mxw-fv2x-rhc6'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83600.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-83600'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-83600'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00548
epssPercentile: 0.43529
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T18:22:18.744373Z'
ingestedAt: '2026-09-22T18:08:12.467Z'
---

## Overview

Netdata is an open source observability tool. Prior to 2.10.4, an authenticated child agent can send an oversized CHART SLOT value that str2ull_encoded passes to pluginsd_rrdset_cache_put_to_slot in src/plugins.d/pluginsd_internals.h. The accepted slot drives reallocz to request an approximately 16 GiB chart-pointer array, and allocation failure invokes fatal and aborts the parent Netdata agent, repeatedly disabling centralized monitoring while stream access persists. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83600.json)