Memory Leak Vulnerability in LiteSpeed QUIC Library by LiteSpeed Technologies

CVE-2025-54939

What is CVE-2025-54939?

CVE-2025-54939 is a memory leak vulnerability found in the LiteSpeed QUIC (LSQUIC) library developed by LiteSpeed Technologies, specifically in versions prior to 4.3.1. The LSQUIC library facilitates the deployment and management of QUIC (Quick UDP Internet Connections) protocols, which are designed to enhance web performance and improve latency for web applications. This vulnerability arises from a flaw in the lsquic_engine_packet_in function, which fails to properly manage memory allocation, leading to a leak that can gradually consume system resources. If exploited, this could negatively impact an organization by compromising system stability and performance, making it susceptible to denial-of-service attacks as memory resources are depleted. Organizations relying on LiteSpeed QUIC for critical web functionalities may face operational disruptions, leading to potential service outages and degradation of user experience.

Potential impact of CVE-2025-54939

1. Denial-of-Service (DoS): The memory leak can lead to resource exhaustion, which might cause applications to become unresponsive or crash, resulting in service downtime.

2. Performance Degradation: Continuous memory consumption could significantly affect the performance of applications, leading to increased latency and reduced throughput for web services that rely on LSQUIC.

3. Operational Costs: The need for additional monitoring, incident response, and potential infrastructure scaling to manage the effects of this vulnerability could lead to increased operational costs for affected organizations.

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