Buffer Over-read Vulnerability in Postfix Email Server

CVE-2026-43964

What is CVE-2026-43964?

A buffer over-read vulnerability has been identified in the Postfix email server that can lead to undesirable behavior. Specifically, when the enhanced status code is returned without adequate text following the third number, this can trigger a buffer over-read condition. This situation may result in a process crash, affecting the stability and reliability of the Postfix email system. Users are encouraged to upgrade to the latest versions to mitigate potential security risks and maintain optimal server performance.

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