Detections
Analytics

Echo: xorg-server: security update to 2:21.1.16-1.3+deb13u1+e2

high Tenable Self-Hosted Container Security Plugin ID 463194

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 integer underflow vulnerability, specifically in the XKB
 compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer
 read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other
 severe impacts. (CVE-2026-33999)

Solution

Update the xorg-server library and its related packages to version 2:21.1.16-1.3+deb13u1+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-33999

Plugin Details

Severity: High

ID: 463194

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.46

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-2026-33999

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

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-2026-33999