Detections
Analytics
Amazon Linux 2023 : xorg-x11-server-Xwayland, xorg-x11-server-Xwayland-devel (ALAS2023-2026-1944)
critical Nessus Plugin ID 328512
Language:
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1944 advisory.glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)
GLX contextTags Use-After-Free in CommonMakeCurrent() (CVE-2026-56000)
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 'dnf update xorg-x11-server-Xwayland --releasever 2023.12.20260720' or or 'dnf update --advisory ALAS2023-2026-1944 --releasever 2023.12.20260720' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1944.html
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: Critical
ID: 328512
File Name: al2023_ALAS2023-2026-1944.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 7/20/2026
Updated: 7/20/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
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
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:xorg-x11-server-xwayland-debuginfo, p-cpe:/a:amazon:linux:xorg-x11-server-xwayland-debugsource, p-cpe:/a:amazon:linux:xorg-x11-server-xwayland-devel, 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: 7/20/2026
Vulnerability Publication Date: 7/8/2026
Reference Information
CVE: CVE-2026-55999, CVE-2026-56000