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Echo: xorg-server: security update to 2:21.1.16-1.3+deb13u1+e3

critical Tenable Self-Hosted Container Security Plugin ID 463392

Description

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

 - A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry
 processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an
 attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,
 either locally or remotely, can exploit this without user interaction. This could lead to the disclosure
 of memory contents or cause a denial of service by crashing the server. (CVE-2026-34000)

Solution

Update the xorg-server library and its related packages to version 2:21.1.16-1.3+deb13u1+e3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-34000

Plugin Details

Severity: Critical

ID: 463392

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.63

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-34000

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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: 4/15/2026

Vulnerability Publication Date: 4/14/2026

Reference Information

CVE: CVE-2026-34000