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CVE-2026-83601— Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write

Quick assessment

Affected
netdata netdata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netdata 是一款开源的可观测性工具。在 2.10.4 版本之前，经过身份验证的子代理（child agent）可以发送一个超大的 DIMENSION SLOT 值，该值会被 函数传递给 中的 函数，而该过程中未对数值设置上限。随后， 中的 函数在执行 类型的内存分配计算时可能发生整数回绕（wrap-around），但仍保留原始的较大数组大小，导致后续的初始化循环在写入数据时超出实际分配的堆内存范围，从而引发父代理（parent agent）崩溃。 此问题已在 2.10.4 版本及 2.10.0-782-nig

CVSS 6.5 · Medium EPSS 0.37% · P31

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
netdata netdata < 2.10.4 affected
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I. Basic Information for CVE-2026-83601

Vulnerability Information
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Vulnerability Title
Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
netdata netdata < 2.10.4 -

II. Public POCs for CVE-2026-83601

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III. Intelligence Information for CVE-2026-83601

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Patches & Fixes for CVE-2026-83601 (2)

Other References for CVE-2026-83601 (2)

Same Patch Batch · netdata · 2026-09-22 · 7 CVEs total

CVE-2026-83603 8.4 HIGH Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE
CVE-2026-83598 7.8 HIGH Netdata: Local Privilege Escalation in Netdata Agent Windows installer via PowerShell Prof
CVE-2026-83599 7.5 HIGH Netdata: WebSocket Decompression Bomb
CVE-2026-83597 7.0 HIGH Netdata: Local Privilege Escalation in Netdata Windows Agent installer via MSI Repair Exec
CVE-2026-83602 6.5 MEDIUM Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via
CVE-2026-83600 6.5 MEDIUM Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request,

IV. Related Vulnerabilities

Same product: netdata
Same vendor: netdata
Same weakness: CWE-190