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Echo: samba: security update to 2:4.9.2+dfsg-2

medium Tenable Self-Hosted Container Security Plugin ID 462415

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of
 service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on
 the same memory if the principal in a validly signed certificate does not match the principal in the AS-
 REQ. This is only possible after authentication with a trusted certificate. talloc is robust against
 further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC
 process. (CVE-2018-16841)

Solution

Update the samba library and its related packages to version 2:4.9.2+dfsg-2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2018-16841

Plugin Details

Severity: Medium

ID: 462415

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2018-16841

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/2/2026

Vulnerability Publication Date: 11/27/2018

Reference Information

CVE: CVE-2018-16841

IAVA: 2018-A-0384-S