CVE-2026-94285
Received Received - Intake

Out-of-Bounds Read in libX11 Byte-Oriented Codeset Parser

Publication date: 2026-09-28

Last updated on: 2026-09-28

Assigner: SUSE

Description
An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

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Meta Information

Published
2026-09-28
Last Modified
2026-09-28
Generated
2026-09-28
AI Q&A
2026-09-28
EPSS Evaluated
N/A
NVD
CVE-2026-94285
EUVD
EUVD-2026-88177

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This is an out-of-bounds read vulnerability in libX11's byte-oriented codeset parser. It exists in versions before 1.8.14 and could allow malicious X servers to crash connected X clients by exploiting improper memory access.

Detection Guidance

This vulnerability involves an out-of-bounds read in libX11's byte-oriented codeset parser. Detection requires checking the installed version of libX11. If your system uses libX11 before 1.8.14, it is vulnerable. Run 'X11 -version' or 'dpkg -l libx11*' on Debian-based systems or 'rpm -qa libX11' on RPM-based systems to check the version.

Impact Analysis

If you use an affected version of libX11, a compromised X server could crash your X client applications. This may lead to denial of service or unexpected application behavior.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it involves a technical flaw in libX11's byte-oriented codeset parser. Compliance impacts would depend on how the affected system is used in a regulated environment rather than the vulnerability itself.

Mitigation Strategies

Update libX11 to version 1.8.14 or later to address the out-of-bounds read vulnerability in the byte-oriented codeset parser.

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