Detections
Analytics

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

high Tenable Cloud Security Plugin ID 464735

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 use-after-free vulnerability occurs in the XSYNC fence
 triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the
 X11 server can exploit this without user interaction, leading to a server crash and potentially enabling
 memory corruption. This could result in a denial of service or further compromise of the system.
 (CVE-2026-34001)

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-2026-34001

Plugin Details

Severity: High

ID: 464735

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.98

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-2026-34001

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-2026-34001