Bug 2542376 (CVE-2026-94285)

Summary: CVE-2026-94285 libX11: libX11: Denial of Service via out-of-bounds read in byte-oriented codeset parser
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
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Hardware: All   
OS: Linux   
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A flaw was found in libX11. An out-of-bounds read vulnerability in the byte-oriented codeset parser allows a malicious X Window System server to cause a Denial of Service (DoS) by crashing connected client applications. This issue may also allow the server to access limited memory contents from the client.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2542984    
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Description OSIDB Bzimport 2026-09-28 09:01:36 UTC
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.