Bug 2562156 (CVE-2026-109088)

Summary: CVE-2026-109088 libXtst: libXtst: Denial of Service via malformed RECORD EnableContext replies
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in libXtst. A malicious X server can send malformed RECORD EnableContext replies to a connected client. When processing these malformed responses, the client enters an infinite loop, resulting in a Denial of Service (DoS) condition where the application becomes unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2565197    
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Description OSIDB Bzimport 2026-10-27 18:06:48 UTC
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.