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Slackware Linux 15.0 / current xorg-server Multiple Vulnerabilities (SSA:2026-189-03)

critical Nessus Plugin ID 325790

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Synopsis

The remote Slackware Linux host is missing a security update to xorg-server.

Description

The version of xorg-server installed on the remote host is prior to 1.20.14 / 21.1.24 / 21.1.4 / 24.1.13. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-189-03 advisory.

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

Tenable has extracted the preceding description block directly from the xorg-server 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 xorg-server package.

See Also

http://www.nessus.org/u?05f0fb1e

Plugin Details

Severity: Critical

ID: 325790

File Name: Slackware_SSA_2026-189-03.nasl

Version: 1.3

Type: Local

Published: 7/9/2026

Updated: 7/15/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.1

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-56000

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9

Threat Score: 6.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vulnerability Information

CPE: p-cpe:/a:slackware:slackware_linux:xorg-server-xwayland, cpe:/o:slackware:slackware_linux:15.0, p-cpe:/a:slackware:slackware_linux:xorg-server, p-cpe:/a:slackware:slackware_linux:xorg-server-xnest, p-cpe:/a:slackware:slackware_linux:xorg-server-xvfb, cpe:/o:slackware:slackware_linux, p-cpe:/a:slackware:slackware_linux:xorg-server-xephyr

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/8/2026

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-55999, CVE-2026-56000

IAVA: 2026-A-0671