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Vulnerability · Published Sep 22, 2026 · Assigned by GitHub_M

CVE-2026-83600Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request, crashing parent agent

Medium 6.5

In plain English

A medium-severity uncontrolled resource consumption in netdata from netdata. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 53.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netdatano fix listedDEBIAN-CVE-2026-83600
Ubuntu:24.04:LTSnetdatano fix listedUBUNTU-CVE-2026-83600

Affected products (as reported)

VendorProductVersions
netdata netdata < 2.10.4

Weakness: CWE-193, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References