Bug 2540375 (CVE-2026-93544)

Summary: CVE-2026-93544 libXi: libXi: Denial of Service via out-of-bounds read in XIQueryDevice reply parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in libXi. This out-of-bounds read vulnerability allows a malicious X server to cause a Denial of Service (DoS) against attached client applications. By returning a specially crafted response to an XIQueryDevice request, the server triggers an invalid memory read within the client, leading to an abnormal application crash.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2540634    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-24 16:34:20 UTC
An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.