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CVE-2026-83603— Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE

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 is an open source observability tool. Prior to 2.10.4, the setuid-root ndsudo helper command fail2ban-client-status-socket in src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from the low-privileged netdata service account. The a

CVSS 8.4 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
netdata netdata < 2.10.4 affected
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I. Basic Information for CVE-2026-83603

Vulnerability Information

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Vulnerability Title
Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE
Source: CVE Program / CVE List V5
Vulnerability Description
Netdata is an open source observability tool. Prior to 2.10.4, the setuid-root ndsudo helper command fail2ban-client-status-socket in src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from the low-privileged netdata service account. The account can direct root fail2ban-client to a malicious UNIX socket, and fail2ban/client/csocket.py CSocket.receive() passes the returned data to pickle.loads(), allowing attacker-controlled code to execute as root on systems with fail2ban-client installed. 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:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
netdata netdata < 2.10.4 -

II. Public POCs for CVE-2026-83603

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III. Intelligence Information for CVE-2026-83603

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Other References for CVE-2026-83603 (4)

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

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-2026-83601 6.5 MEDIUM Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer over
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-73

V. Comments for CVE-2026-83603

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