CVE-2026-109088
Received Received - Intake

X Server Endless Loop via Malformed RECORD EnableContext

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: SUSE

Description
A malicious X server could send malformed  RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-109088
EUVD
EUVD-2026-111114

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
X.org libXtst 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-835 The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

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Executive Summary

This vulnerability involves a malicious X server sending malformed RECORD EnableContext replies. This can cause an X client using the parse_reply_call_callback function in libXtst versions before 1.2.6 to enter an endless loop, leading to a denial of service.

Impact Analysis

This vulnerability can cause affected X clients to hang or become unresponsive, disrupting normal operations. It may lead to system slowdowns or crashes, affecting usability and productivity.

Mitigation Strategies

Update libXtst to version 1.2.6 or later to address the vulnerability in the parse_reply_call_callback function.

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