Detections
Analytics

Echo: xorg-server: security update to 2:21.1.16-1.3+deb13u4

critical Tenable Self-Hosted Container Security Plugin ID 459096

Description

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

 - Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24
 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into
 potentially reallocated memory. (CVE-2026-56000)

Solution

Update the xorg-server library and its related packages to version 2:21.1.16-1.3+deb13u4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-56000

Plugin Details

Severity: Critical

ID: 459096

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/8/2026

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-56000