A buffer overflow when handling pointer barriers in the XFIXES extension in X.Org X server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
History

Fri, 06 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 28 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in xorg-x11-server. The server writes pointer barrier events into a fixed-size buffer without properly validating boundaries. An authenticated client can trigger this issue by configuring excessive pointer barriers and generating cursor motion events, causing a buffer overflow. This vulnerability may lead to arbitrary code execution or cause the server to crash, resulting in a Denial of Service (DoS). A buffer overflow when handling pointer barriers in the XFIXES extension in X.Org X server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
Title xorg-x11-server: XFixes Pointer Barrier Event List Buffer Overflow X.Org Server XFixes Pointer Barrier Event List Buffer Overflow
First Time appeared X.org
X.org xorg-x11-server
X.orgg
X.orgg xwayland
Weaknesses CWE-122
CPEs cpe:2.3:a:x.org:xorg-x11-server:*:*:*:*:*:*:*:*
cpe:2.3:a:x.orgg:xwayland:*:*:*:*:*:*:*:*
Vendors & Products X.org
X.org xorg-x11-server
X.orgg
X.orgg xwayland
References

Thu, 08 Oct 2026 12:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in xorg-x11-server. The server writes pointer barrier events into a fixed-size buffer without properly validating boundaries. An authenticated client can trigger this issue by configuring excessive pointer barriers and generating cursor motion events, causing a buffer overflow. This vulnerability may lead to arbitrary code execution or cause the server to crash, resulting in a Denial of Service (DoS).
Title xorg-x11-server: XFixes Pointer Barrier Event List Buffer Overflow
Weaknesses CWE-787
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


cve-icon MITRE

Status: PUBLISHED

Assigner: suse

Published: 2026-10-28T14:41:33.873Z

Updated: 2026-11-05T18:51:15.136Z

Reserved: 2026-09-18T08:46:56.692Z

Link: CVE-2026-93519

cve-icon Vulnrichment

Updated: 2026-11-05T18:51:07.713Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-28T15:17:10.547

Modified: 2026-11-05T19:17:28.170

Link: CVE-2026-93519

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-07T12:00:00Z

Links: CVE-2026-93519 - Bugzilla