CVE-2026-83603

Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE

State: Published
Severity: 8.4 High
Published: Sep 22, 2026
Updated: Sep 22, 2026
Reserved: Aug 31, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-73 External Control of File Name or Path
CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
netdatanetdata	< 2.10.4Affected

References

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