Description
A flaw was found in xorg-x11-server. Due to an integer truncation issue during memory allocation calculations within the X Keyboard Extension (XKB), the server allocates an undersized buffer when resizing key types. An authenticated local client can exploit this vulnerability by sending specially crafted XKB requests, causing a heap-based buffer overflow. This can result in arbitrary code execution or a denial of service (DoS).
Published: n/a
Score: 7.8 High
EPSS: n/a
KEV: No
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Remediation

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Advisories

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History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
First Time appeared X.org
X.org xorg-server
Vendors & Products X.org
X.org xorg-server

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

Type Values Removed Values Added
Description A flaw was found in xorg-x11-server. Due to an integer truncation issue during memory allocation calculations within the X Keyboard Extension (XKB), the server allocates an undersized buffer when resizing key types. An authenticated local client can exploit this vulnerability by sending specially crafted XKB requests, causing a heap-based buffer overflow. This can result in arbitrary code execution or a denial of service (DoS).
Title xorg-x11-server: XKB ResizeKeyType Numeric Truncation
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


Subscriptions

X.org Xorg-server
cve-icon MITRE

No data.

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2026-93518 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T21:00:08Z

Weaknesses