Executive Summary

CVE-2025-14969 is a vulnerability in Hibernate Reactive where if a remote client prematurely closes an HTTP connection during database operations, it can cause database connections to leak from the connection pool. This leak can exhaust available connections, potentially causing a Denial of Service (DoS). [1]

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Impact Analysis

This vulnerability can lead to a Denial of Service (DoS) by exhausting the database connection pool. When connections leak due to premature client disconnections, the application may run out of available database connections, causing service unavailability and impacting the reliability and availability of your system. [1]

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Detection Guidance

This vulnerability can be detected by monitoring the database connection pool usage for leaks, especially after HTTP clients disconnect prematurely. You can check for an unusually high number of active or leaked connections in your database connection pool. Commands to monitor database connections depend on your database system; for example, for PostgreSQL, you can use: `SELECT * FROM pg_stat_activity;` to view active connections. Additionally, monitoring your application logs for errors related to connection pool exhaustion or unexpected client disconnects can help detect this issue. [1]

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Mitigation Strategies

Immediate mitigation steps include implementing proper handling of client disconnects in your application to ensure database connections are released back to the pool promptly. You should also monitor and limit the maximum number of connections in the pool to prevent exhaustion. Applying any available patches or updates from Hibernate Reactive that address this issue is recommended once released. Additionally, consider implementing timeouts or connection validation to detect and close leaked connections. [1]

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