CVE-2026-83601

Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write

6.5 Medium

Netdata is an open source observability tool. Prior to 2.10.4, an authenticated child agent can send an oversized DIMENSION SLOT value that str2ull_encoded passes to pluginsd_rrddim_put_to_slot in src/plugins.d/pluginsd_internals.h without an upper bound. prd_array_create in src/database/rrdset-pluginsd-array.h can then wrap the size_t allocation calculation while retaining the original large array size, causing the subsequent initialization loop to write beyond the undersized heap allocation and crash the parent agent. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.37%Down 0.2 points since Sep 23, 2026

What each source reports

CVE List Score used 6.5

Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write

Record: CVE-2026-83601
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-190, CWE-787
Updated: 2026-11-02

EUVDEUVD-2026-84563 6.5

Record: EUVD-2026-84563
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

NVD 6.5

Record: CVE-2026-83601
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-190, CWE-787
Updated: 2026-11-02

OSV 6.5

Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write

Record: CVE-2026-83601
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-190, CWE-787
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-83601 6.5

Record: DEBIAN-CVE-2026-83601
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-83601 6.5

Record: UBUNTU-CVE-2026-83601
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

netdata

Affected packages

Affected packages
Package	Affected	Fixed
`netdata` Debian:12	All versions, plus listed versions 1.37.1-21.38.0-11.38.1-11.39.0-11.39.1-1 Show 26 moreShow less 1.39.1-21.40.0-11.40.0-21.40.1-11.41.0-11.42.0-11.42.1-11.42.2-11.42.3-11.42.4-11.43.0-11.43.1-11.43.2-11.44.3-11.44.3-21.46.3-11.46.3-21.47.0-11.47.1-11.47.2-11.47.5-12.0.3+dfsg-12.0.3+dfsg-22.0.3+dfsg-32.0.3+dfsg-42.0.3+dfsg-5	None known
`netdata` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.7.0+dfsg-11.8.0+dfsg-11.9.0+dfsg-11.9.0+dfsg-1ubuntu0.1~esm1	None known
`netdata` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1.16.1-21.19.0-3ubuntu11.19.0-3ubuntu1+esm1	None known
`netdata` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1.29.3-41.31.0-41.33.1-1ubuntu11.33.1-1ubuntu1+esm1	None known
`netdata` Ubuntu:24.04:LTS	All versions, plus listed versions 1.42.1-11.43.1-11.43.2-11.43.2-1build11.43.2-1build2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-83601 is a medium vulnerability (CVSS 6.5) in Netdata, published September 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.