Detections
Analytics

Amazon Linux 2 : xorg-x11-server (ALAS-2026-4108)

high Nessus Plugin ID 379888

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-4108 advisory.

 A flaw in the X.Org Server's handling of EDID Display-Range descriptors can result in an out-of-bounds write, potentially leading to server crashes or memory corruption. (CVE-2026-109091)

 A bounds-checking flaw in the X.Org Server's XvShmPutImage handling can result in an out-of-bounds read or write, potentially leading to server crashes or memory corruption. (CVE-2026-109092)

 A flaw in the X.Org Server's XTestFakeInput handling can result in a stack out-of-bounds write, potentially leading to server crashes or stack memory corruption. (CVE-2026-109093)

 An integer overflow flaw in the X.Org Server's glamor Xv image size computation can result in out-of- bounds reads, potentially leading to server crashes or unintended memory access. (CVE-2026-109095)

 A flaw in the X.Org Server's XvPutImage length validation can allow requests with missing image data to be processed, potentially leading to server crashes or misbehavior. (CVE-2026-109096)

 A flaw in the X.Org Server's XvQueryImageAttributes reply handling can result in clients receiving an incorrect data size value, potentially leading to improper buffer allocation or usage. (CVE-2026-109903)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update xorg-x11-server' or or 'yum update --advisory ALAS2-2026-4108' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2026-4108.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-109091.html

https://explore.alas.aws.amazon.com/CVE-2026-109092.html

https://explore.alas.aws.amazon.com/CVE-2026-109093.html

https://explore.alas.aws.amazon.com/CVE-2026-109095.html

https://explore.alas.aws.amazon.com/CVE-2026-109096.html

https://explore.alas.aws.amazon.com/CVE-2026-109903.html

Plugin Details

Severity: High

ID: 379888

File Name: al2_ALAS-2026-4108.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/12/2026

Updated: 11/12/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.5

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-2026-109903

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

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:xorg-x11-server-common, p-cpe:/a:amazon:linux:xorg-x11-server-debuginfo, p-cpe:/a:amazon:linux:xorg-x11-server-devel, p-cpe:/a:amazon:linux:xorg-x11-server-source, p-cpe:/a:amazon:linux:xorg-x11-server-xdmx, p-cpe:/a:amazon:linux:xorg-x11-server-xephyr, p-cpe:/a:amazon:linux:xorg-x11-server-xnest, p-cpe:/a:amazon:linux:xorg-x11-server-xorg, p-cpe:/a:amazon:linux:xorg-x11-server-xvfb, p-cpe:/a:amazon:linux:xorg-x11-server-xwayland

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2026

Vulnerability Publication Date: 11/10/2026

Reference Information

CVE: CVE-2026-109091, CVE-2026-109092, CVE-2026-109093, CVE-2026-109095, CVE-2026-109096, CVE-2026-109903