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Critical Race Condition in OpenSSH (CVE-2024-6409): Patch Urgently on AlmaLinux 9 and CentOS 9 Systems June 5, 2025

A serious race condition vulnerability has been discovered in how OpenSSH’s server (sshd) handles signals, which affects systems running AlmaLinux 9 and CentOS 9. If a remote user initiates a connection but fails to authenticate within a certain timeout, the SIGALRM signal is triggered asynchronously. Critically, the signal handler makes calls to functions such as […]

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