CVE-2026-93520
X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
| CWE | CWE-122 |
| Vendor | x.org |
| Product | xorg-x11-server |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
x.org / xorg-x11-server
0 < 21.1.25
x.org / xwayland
0 < 24.1.14
References
Credits
Anonymous working with TrendAI Zero Day Initiative