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Slackware Linux 15.0 / current libX11 Multiple Vulnerabilities (SSA:2026-289-01)

high Nessus Plugin ID 366686

Synopsis

The remote Slackware Linux host is missing a security update to libX11.

Description

The version of libX11 installed on the remote host is prior to 1.8.14. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-289-01 advisory.

 New libX11 packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the libX11 security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the affected libX11 package.

See Also

http://www.nessus.org/u?5c23a176

Plugin Details

Severity: High

ID: 366686

File Name: Slackware_SSA_2026-289-01.nasl

Version: 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-88806

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:15.0, p-cpe:/a:slackware:slackware_linux:libx11

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Ease: No known exploits are available

Patch Publication Date: 10/16/2026

Vulnerability Publication Date: 9/21/2026

Reference Information

CVE: CVE-2026-88806, CVE-2026-94283, CVE-2026-94284, CVE-2026-94285