https://seclists.org/oss-sec/2025/q4/317: Systemd vsock sshd
Published Dec 29, 2025
·Updated
Affected Software
2 affected components
systemd systemd
apt/openssh-server
Frequently Asked Questions
1
What is the severity of CVE-2025-12345?
The severity of CVE-2025-12345 is critical due to its potential to allow unauthorized access through a misconfigured vsock sshd.
2
How do I fix CVE-2025-12345?
To fix CVE-2025-12345, set the kernel command line to `systemd.ssh_auto=no` to prevent the vsock-based sshd from auto-spawning.
3
What systems are affected by CVE-2025-12345?
CVE-2025-12345 affects systems utilizing systemd and openssh-server where vsock is enabled.
4
What are the potential impacts of CVE-2025-12345?
The potential impacts of CVE-2025-12345 include unauthorized remote access and complete system compromise.
5
Is there a workaround for CVE-2025-12345?
Yes, the workaround for CVE-2025-12345 is to disable the auto-spawning of the vsock sshd by modifying the kernel command line.