PT-2026-33102 · Unknown+2 · Xorg-X11-Server+2

Published 2026-03-25 · Updated 2026-06-09 · CVE-2026-33999

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions xwayland versions prior to 24.1.9-2.1 xorg-x11-server versions prior to 21.1.21-5.1

Description Security issues were identified in xwayland and xorg-x11-server.

Recommendations Update xwayland to version 24.1.9-2.1. Update xorg-x11-server to version 21.1.21-5.1.

Fix

DoS

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

ALSA-2026:10739

ALSA-2026:11352

ALSA-2026:11369

ALSA-2026:11388

ALSA-2026:11656

ALSA-2026:11692

ALSA-2026:13414

ALSA-2026:19125

ALSA-2026:19343

ALSA-2026:19344

BDU:2026-05826

CVE-2026-33999

ECHO-3BF6-384C-577F

OESA-2026-2139

OPENSUSE-SU-2026:10556-1

OPENSUSE-SU-2026:10557-1

OPENSUSE-SU-2026:20544-1

OPENSUSE-SU-2026:20560-1

RHSA-2026:10739

RHSA-2026:11352

RHSA-2026:11369

RHSA-2026:11388

RHSA-2026:11656

RHSA-2026:11692

RHSA-2026:13414

RHSA-2026:19125

RHSA-2026:19342

RHSA-2026:19343

RHSA-2026:19344

RHSA-2026:20547

RHSA-2026:20555

RHSA-2026:20557

RHSA-2026:20558

RHSA-2026:20560

RHSA-2026:20561

RHSA-2026:20562

RHSA-2026:20563

RHSA-2026:20575

RHSA-2026:20576

RHSA-2026:20590

RHSA-2026:21699

RHSA-2026:21712

RHSA-2026:21715

RHSA-2026:21716

RHSA-2026:21718

RHSA-2026:21741

RHSA-2026:21742

RHSA-2026:22424

RHSA-2026:22456

RHSA-2026:23254

RHSA-2026:23255

RHSA-2026:23496

SUSE-SU-2026:1328-1

SUSE-SU-2026:1329-1

SUSE-SU-2026:1330-1

SUSE-SU-2026:1331-1

SUSE-SU-2026:1332-1

SUSE-SU-2026:1333-1

SUSE-SU-2026:1335-1

SUSE-SU-2026:21211-1

ZDI-26-333

Affected Products

Rocky Linux

Xorg-X11-Server

Xwayland

References · 143

• https://access.redhat.com/errata/RHSA-2026:11352 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33999 · Security Note
• https://access.redhat.com/errata/RHSA-2026:21741 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:20558 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:24341 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:23496 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34000 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:20544-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33999 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2026-13414.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33999 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:13414 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34001 · Security Note
• https://access.redhat.com/errata/RHSA-2026:20560 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1335-1 · Vendor Advisory