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Public proof of conceptAwaiting NVD analysis

CVE-2026-83601

A public proof of concept exists; no exploitation attested.

  • Published2026-09-22
  • WeaknessCWE-190 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-09-2217:17CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • netdata
    Affected
    • = < 2.10.4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-09-22

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • netdataUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • netdataUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • netdataUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • netdataUbuntu:24.04:LTSall versions · no fixed version listed
  • netdataDebian:12all versions · no fixed version listed
  • netdata-2.10MinimOSall versions · fixed in 2.10.4-r0and 3 other packages

Vendor advisories

  • CVE-2026-83601 Red Hat Product Security

    netdata: Netdata: Denial of Service via oversized DIMENSION SLOT value

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2026-09-25
  • CNACVSS 3.16.5known since 2026-10-23
  • CNAweakness (CWE)CWE-190, CWE-787known since 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-09
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2026-09-22
Last Modified
2026-09-26
NVD status
Awaiting Analysis

Frequently asked questions

What is CVE-2026-83601?

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.

Is CVE-2026-83601 actively exploited?

A proof-of-concept exploit exists for CVE-2026-83601, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-83601?

CVE-2026-83601 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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