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CVE-2026-93519

X.Org Server XFixes Pointer Barrier Event List Buffer Overflow

HIGH
7.8
CVSS Score
Published: October 28, 2026 at 02:41 PM UTC
Updated: October 28, 2026 at 03:21 PM UTC
2 products affected across 1 vendorXwaylandxorg-x11-server

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xwayland· X Org
99%
All versions
xorg-x11-server· X Org
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Patch
Source: cverecord
https://gitlab.freedesktop.org/xorg/xserver/-/commit/1f42cc1f00d9c6d46978ae82dba8a52f4d902369

CVSS

7.8HIGHsuse
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-122

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