Bug 2564735 (CVE-2026-107457)

Summary: CVE-2026-107457 qt: qt: Denial of Service via memory corruption in QMqttClient
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Qt. Under certain MQTT version 5 (MQTT 5) connection settings between a client and a server, the QMqttClient class can corrupt memory. A remote attacker could exploit this vulnerability to crash the affected application, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2565252, 2565253    
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Description OSIDB Bzimport 2026-11-02 08:52:37 UTC
A memory corruption vulnerability in the QMqttClient class of the Qt MQTT module. Under certain MQTT 5 connection settings between client and server, QMqttClient may corrupt memory, which can cause the application to crash.