CVE-2026-93542

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BaseFortify

Publication date: 2026-09-24

Last updated on: 2026-09-24

Assigner: SUSE

Description

An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-24

Last Modified

2026-09-24

Generated

2026-10-15

AI Q&A

2026-09-25

EPSS Evaluated

2026-10-13

NVD

CVE-2026-93542

EUVD

EUVD-2026-86210

Affected Vendors & Products

Vendor	Product	Version / Range
x.org	libXi	0

Helpful Resources

Exploitability

CWE

KEV

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

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read flaw in libXi's XI2 class parsing functions, size_classes() and copy_classes(). It exists in versions of libXi before 1.8.4. A malicious server could exploit this to crash X client applications by sending specially crafted data.

Detection Guidance

This vulnerability involves an out-of-bounds read in libXi's XI2 class parsing functions. Detection requires checking the installed version of libXi. Run 'dpkg -l libxi6' on Debian/Ubuntu or 'rpm -q libXi' on RHEL-based systems to verify if the version is below 1.8.4. If vulnerable, update the library immediately.

Impact Analysis

This vulnerability could allow a remote attacker to crash your X client applications by sending malicious input. This may lead to denial-of-service conditions, disrupting your workflow or services that rely on these applications.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR, HIPAA, or similar standards. It is an out-of-bounds read issue in libXi that could cause X client crashes but does not involve data exposure or unauthorized access.

Mitigation Strategies

Update libXi to version 1.8.4 or later to address the out-of-bounds read vulnerability in XI2 class parsing.

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